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3 years ago

Adrian purchases a book for $4.86 and a poster for $3.44. If she gives the cashier

Mathematics

1 answer:

Svetradugi [14.3K]3 years ago

8 0

Answer:

$6.70

Step-by-step explanation:

Adrian purchases a book for 4.86 and a poster for 3.44

The total amount he owes would be 4.86 + 3.44 = $8.30

If she gives the cashier 15 dollars she should receive 15 - 8.30 = $6.70 back.

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[TON OF POINTS] [3 QUESTIONS - Easy money :)]

kherson [118]

The <u>correct answers</u> are:

1/6πd³;
3; and
9 cm.

Explanation:

For the <u>first question</u>:

The formula for the volume of a sphere is:

$V=\frac{4}{3}\pi r^3$

We have the diameter, not the radius. The diameter is twice as much as the radius; this means to find the radius using the diameter, we divide by 2. This gives us:

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

When we raise a fraction to a power, we raise both the numerator and the denominator to that power. This gives us:

$V=\frac{4}{3}\pi(\frac{d^3}{2^3})
\\
\\=\frac{4}{3}\pi(\frac{d^3}{8})$

We start multiplying this:
$V=\frac{4\pi}{3}(\frac{d^3}{8})
\\
\\=\frac{4\pi d^3}{3\times 8}
\\
\\=\frac{4\pi d^3}{24}
\\
\\=\frac{4}{24}\pi d^3
\\
\\=\frac{1}{6}\pi d^3$

For the <u>second question</u>:

The planes of symmetry are the planes through which we can fold the figure in half. These are in the middle horizontally through the figure; in the middle vertically (through the width) through the figure; and in the middle vertically (through the length) through the figure. This makes 3.

For the <u>third question</u>:

The formula for the volume of a triangular prism is:

$V=\frac{1}{3}(\frac{1}{2}bh)H$ ,

where b is the base of the triangular base of the pyramid, h is the height of the triangular base of the pyramid, and H is the height of the pyramid.

We know the volume is 90; the base of the triangle is 12 and the height is 5:

$90 = \frac{1}{3}(\frac{1}{2}\times 12\times 5)H
\\
\\90 = \frac{1}{3}(\frac{1}{2}\times 60)H
\\
\\90 = \frac{1}{3}(30)H
\\
\\90 = 10H$

We divide both sides by 10:

90/10 = 10H/10
9 = H

4 0

4 years ago

If you have 3⁄8 of one pie, what does the denominator tell you?

serg [7]

the pie cut into 8 pieces

8 0

3 years ago

How much time has passed from the first clock to the second clock? The time passed us less than 12 hours.

Elodia [21]

5 hours and 4 minutes

<h3>Reason</h3>

The first clock is 4:25

The second clock is 9:29

9:29-

4:25=

5:04

7 0

4 years ago

Read 2 more answers

A pound is approximately 0.45 kilogram. A person weighs 87 kilograms. What is the person's weight, in pounds, when rounded to th

Vlada [557]

Answer:

you multiply 0.45kg by 87kg you will get 39lb

8 0

3 years ago

ΔRST and ΔXYZ are equilateral triangles. The ratio of the perimeter of ΔRST to the perimeter of ΔXYZ is 1 to 3. The area of ΔRST

Eduardwww [97]

Answer: D- 97.4

Step-by-step explanation:

For the scale factor of 1:3. Use ratio and proportion to solve for the area of the triangle.

area of triangle RST/ area of triangle XYZ = (1/3)^2

where

area of traianlge RST = 10.825 inch^2

Area of triangle XYZ= Area of triangle RST x (3)^2

Substitute the given values=97.4 inch^2

6 0

4 years ago

Read 2 more answers