Ask question

Ask question

All categories

3 years ago

8

If 5/8 of the people in a water aerobics class are over age 65 and 1/4 of the people in the class are under age 40, what fractio

n of the people in the class are either over 65 or under 40?

1 answer:

agasfer [191]3 years ago

7 0

Answer:

7/8

Step-by-step explanation:

You just need to add the two fractions together. Since no one can be both, no other revision is needed.

5/8 + 1/4 = 5/8 + 2/8 = 7/8

You might be interested in

The object below was made by placing a cone on top of a cylinder. The base of the cone is congruent to the base of the cylinder.

Ber [7]

Answer:

Part 1) The volume of the object is $32\pi\ cm^{3}$ or $100.48\ cm^{3}$

Part 2) see the procedure

Step-by-step explanation:

<u><em>The picture of the question in the attached figure</em></u>

Part 1) What is the volume, in cubic centimeters, of the object?

we know that

The volume of the object is equal to the volume of the cylinder plus the volume of the cone

Find the volume of the cone

The volume of the cone is equal to

$V=\frac{1}{3}\pi r^{2} h$

we have

$r=4/2=2\ cm$ -----> the radius is half the diameter

$h=3\ cm$

substitute the values

$V=\frac{1}{3}\pi (2^{2})(3)=4\pi\ cm^{3}$

Find the volume of the cylinder

The volume of the cylinder is equal to

$V=\pi r^{2} h$

we have

$r=4/2=2\ cm$ -----> the radius is half the diameter

$h=(10-3)=7\ cm$

substitute the values

$V=\pi (2^{2})(7)=28\pi\ cm^{3}$

Part 2) Then explain how you found the volume of the total shape

The volume of the total shape is equal to the volume of the cylinder plus the volume of the cone

$4\pi\ cm^{3}+28\pi\ cm^{3}=32\pi\ cm^{3}$ ------> exact value

Find the approximate value of the volume

assume

$\pi=3.14$

$32(3.14)=100.48\ cm^{3}$

7 0

3 years ago

Read 2 more answers

Is the following statement true? Explain.

sukhopar [10]

Step-by-step explanation:

We can prove the statement is false by proof of contradiction:

We know that cos0° = 1 and cos90° = 0.

Let A = 0° and B = 90°.

Left-Hand Side:

cos(A + B) = cos(0° + 90°) = cos90° = 0.

Right-Hand Side:

cos(A) + cos(B) = cos(0°) + cos(90°)

= 1 + 0 = 1.

Since LHS =/= RHS, by proof of contradiction,

the statement is false.

4 0

3 years ago

Fine the area if the figure.(Sides meet at the right angles)

Liula [17]

Answer:

45 cm²

Step-by-step explanation:

6 0

2 years ago

The first four terms of a geometric sequence are 27, x, 3, 1. find the value of x

Vikki [24]

Answer:

9

Step-by-step explanation:

7 0

2 years ago

Twice a number plus 6 is 20

grigory [225]

Answer:

7

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers