How much of a radioactive kind of lanthanum will be left after 120 hours if you start with 160
grams and the half-life is 40 hours?

Answers

Answer 1

Answer:

20 grams should be correct

Step-by-step explanation:


Related Questions

PLEASE HELP ANYONE-------You were asked to calculate the average rate of change for the number of shares from 2 minutes to 4 minutes. Using math symbols, the interval between the number of shares from 2 minutes to 4 minutes is written as

Answers

Answer:

2

Step-by-step explanation:

Find the slop on the graph rise run m =

Answers

Answer:

There is no graph

Step-by-step explanation:

*I see

*I think

*I think before I speak

*I say " There is no graph

I try to make people laugh when they mess up a little, we all mess up

Find the value of w.
1080
400
w
z
w = [?]

Answers

Answer:

w = 54°

Step-by-step explanation:

The inscribed angle w is half the measure of its intercepted arc, that is

w = [tex]\frac{1}{2}[/tex] × 108° = 54°

large bag of popcorn costs $ 4. A small bag costs $ 3. The theater sold 59 bags of popcorn and made $ 200. How many of each size was sold?

Answers

Answer:

36 units of small size popcorn

23 Units of Large popcorn

Step-by-step explanation:

Data:-

Cost of large bag of popcorn = $4/-

Cost of Small bag of popcorn = $3/-

Unit Sold = 59 Bags

Sale = $200.

Required:-

No of unit each size sold = ?

Solution:-

After applying direct formula to computation is below mentioned:

= (36 x 3)+(23x4)

=$200

Can someone plz help me with this one problem plsss ??!!

Answers

Answer: 147.2

Step-by-step explanation:

Ok, so- ! Perimeter is basically each side added up, or, in this situation, times four :). They already gave you the total, so all you need to do is divide 36.8 by four, leaving you with 9.2 ! Hope this helped :)

Write the slope intercept form of the equation of each line given the slope and y intercept

Answers

Answer:

Heyy, could you please take a screenshot? It'll be so much easier to see haha. Try Snipping tool if you have Windows, and Command + Shift + 4 for screenshot on Mac. Then I can answer.

Step-by-step explanation:

Can someone help me find the surface area and volume for these shapes ty.

Answers

Answer:

you multiply im pretty sure

Step-by-step explanation:

1/3 = 0.333 repeating 3/3=1 0.333*3=0.999 repeating. Does 0.999 repeating =1? Please explain I've asked this twice already!!

Answers

Answer:

yes and no

Step-by-step explanation:

0.999... is as close as you can get to 1 and not actually be there.

Most people just round up to 1

HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP


Answers

Answer:

D

Step-by-step explanation:

f(n)=-13-2(n) if n=-1 then f(n)=-15 if n=-2 then f(n)=-17

If a 40,000g cannon ball is 35m above the Earth’s surface, how much potential energy does the cannon ball have?

Answers

Answer:

Step-by-step explanation:

Remark

You could do this by converting the distance but the much more common way is to use kg and m.

Formula

PE = m * g * h

Givens

m = 40000 grams

m = 40000 grams * 1kg/1000 grams = 40 kg

g = 9.81

h = 35 m

Solution

PE = 40 * 9.81 * 35

PE = 13734 Joules

Rewrite the quadratic expression in faceted format: f left parenthesis x right parenthesis equals negative x squared minus 4 x plus 21

Answers

Answer:

[tex]f(x)=-x^2-4x+21[/tex]

Step-by-step explanation:

The given equation is :

f left parenthesis x right parenthesis equals negative x squared minus 4 x plus 21.

We need to rewrite this equation in faceted format.

The general form of a quadratic equation is given by :

[tex]f(x)=ax^2+bx+c[/tex]

We have,

a = -1, b = -4 and c = 21

Substitute all the values,

[tex]f(x)=-x^2-4x+21[/tex]

So, the required equation is equal to [tex]f(x)=-x^2-4x+21[/tex].

what is the equation of the line that passes through point (4 -6) and has a slope of -3

Answers

Answer:

y-y1=m(x-x1)

y-(-6)=-3(x-4)

y+6=-3x+12

y=-3x+6the final answer

Need help fast.

14 points


Answers

Answer:

B) 4.52cm²

Step-by-step explanation:

If the shaded area represents 1/4 the area of a circle, then given a diameter of 4.8cm, the area of the entire circle is A=πr²=π(4.8/2)²=π(2.4)²=5.76π=5.76(3.14)=18.0864cm²

Since we're finding 1/4 the area of the circle, then 1/4*18.0864=4.5216cm²

So the shaded area is 4.5216cm², making the closest choice B) 4.52cm²

A plane is slicing the cuboid parallel to its base. Name the shape of cross section which is slicing the cuboid.PLEASE RESPOND FAST!!!!

Answers

Square duh easy like

Answer: its Square but the top one is rectangle

PLEASE ANSWER I WILL GIVE YOU BRAINLIEST

Answers

Answer:

answer is A

hope it helps

A is the answer in here

Match the function with the graph

Answers

y=x^3+2 , It’s the answer ;)
Have a good day!

2.) Find the area of a rectangle with base length 10 cm and diagonal
length 15 cm. Hint: draw a picture
O(A) 111.8 cm
O (B) 150.0 cm
(C) 167.7 cm
O (D) 180.0 cm

Answers

i think answe is b


B final answer

Which of the following shows how to simplify 2 (4a + 6)?
O 8a + 12
O 12a + 8
O 2a + 3

Answers

First one
You have to work out between 2 x 4a = 8a
Then you work out between 2 x 6 = 12
8a + 12

Please help!! Select the values for the domain & range of the function given below.

Answers

Answer:

the first one n second one

The table shows the results of a survey of 150 students. Use the table to find the probability of a student participating in each sport.

1. Tennis
2. Football
3. Gymnastics
4. Volleyball
Can someone please help!

Answers

Answer:

See below

Step-by-step explanation:

Using the table of 150 students, we can configure probabilities.

18 students participate in tennis, so the probability of a student participating in tennis is 18/150, or 3/25 simplified.

45 students participate in football, so the probability of a student participating in football is 45/150, or 3/10 simplified.

12 students participate in gymnastics, so the probability of a student participating in gymnastics is 12/150, or 2/25 simplified.

9 students participate in volleyball, so the probability of a student participating in volleyball is 9/150, or 3/50 simplified.

Can someone help me find the volume of the cone and the entire figure

Answers

Answer:

10x15x10 1500

Step-by-step explanation:

Help!!! I will give brainiest if correct!

Answers

Answer:

she would need 7 ounces

Step-by-step explanation:

Answer:

48

Step-by-step explanation:

To keep her grades up madeline must earn more than 80 points on her science fair project. Let p represent the number of points she could earn.

Answers

Answer:

[tex]p > 80[/tex]

Step-by-step explanation:

Given

Points = More than 80

Required [Missing from the question]

Represent as an inequality

Let p represents the number of points.

More than means greater than i.e. >

Hence, more than 80 is represented as;

[tex]p > 80[/tex]

The image shows a circle centered at point O. Angle AOB measures 50 degrees. What is the measure of angle ACB?

Answers

Answer:

b) ∠ACB = 25 degrees

Step-by-step explanation:

arc BA = 50° because central angle AOB = 50°

∠ACB is inscribed angle of 50°, so it is (1/2)(50) = 25°

The measure of angle ACB is 25°. The correct option is a. 25 degrees

Circle Geometry

From the question, we are to determine the measure of angle ACB

From one of the Circle theorems, we have that

The angle at the center of a circle is twice the angle at any part of the circumference.

That is, in the given circle

<AOB = 2 × <ACB

Then,

<ACB = 1/2(<AOB)

<ACB = 1/2 × 50°

<ACB = 25°

Hence, the measure of angle ACB is 25°. The correct option is a. 25 degrees

Learn more on Circle theorems here: https://brainly.com/question/16879446

47 Points | Please help! | Giving Brainliest to correct answer | Reporting false answers

Answers

Answer:

Maria :>

Step-by-step explanation:

because Gross Income is what you take out of your net income. so if your taking something out of it, that means its less.

Why do equivalent ratios form a straight line when graphed?

Answers

Answer:

The y-values of equivalent ratios increase at the same rate as their x-values. The vertical distance between points is constant, and the horizontal distance between points is constant. This forms a straight line.

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

edgen

A golf ball is hit in not the air represented by the equation y= -3x^2+18x+45. The maximum height the ball will reach is____ feet

Answers

Answer:

72 ft

Step-by-step explanation:

Here, we want to get the maximum height the ball will reach

the maximum height the ball will reach is equal to the y-coordinate of the vertex of the equation

So we need firstly, the vertex of the given quadratic equation

The vertex can be obtained by the use of plot of the graph

By doing this, we have it that the vertex is at the point (3,72)

Thus, we can conclude that the maximum height the ball can reach is 72 ft

Can anyone help me wit this please, with an explanation

Answers

Answer:

ΔABC → ΔA'B'C'

7 up and 6 right

(x - 6, y + 7)

ΔA'B'C' → ΔA''B''C''

Reflection over the x-axis

(x, -y)

Which of the following could be the equation of the quadratic shown below?

Answers

Answer:

option A

Step-by-step explanation:

There's no data provided in the graph. We can interpret from the options provided .

Firstly we see that the parabola opens downwards , so the coefficient of a will be negative .

Secondly we can observe the graph cuts y axis above the x axis . So the sign of constant will be positive .

All these matches with option a . Hence option A is correct .

[tex]\implies y = -2x^2 + 8x + 7 [/tex]

One customer paid $12 for 14 postcards and 5 large envelopes. Another customer paid $24.80 for 10 postcards and 15 large envelopes. What was the cost in dollars of each large envelope?

Answers

Answer:

$1.42

Step-by-step explanation:

Since, The first customer paid $12 for 14 postcards and 5 large envelopes.

That is, 14 x + 5 y = 12        ------ (1)

And, The second customer paid $24.80 for 10 postcards and 15 large envelopes.

That is, 10 x + 15 y = 24.80  -------(2)

3 × equation (1),

We get, 42 x + 15 y = 36 ---------(3)

Equation (3) - Equation (2)

32 x = 11.20

⇒ x = 11.20/32

⇒ x = 0.35

By putting the value of x in equation (1),

We get, 14 × 0.35 + 5 y = 12

⇒ 4.9 + 5 y = 12

⇒ 5 y = 7.1

⇒ y = 1.42

Thus, the cost of one postcard = $ 0.35

And, the cost of each large envelope = $ 1.42

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