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postnew [5]
3 years ago
8

You join a book club in which the membership dues cost $15. Books are all the same price, which includes tax. If you buy four bo

oks when you start your membership and are charged $66.80, what is the price of each book?
Mathematics
1 answer:
ser-zykov [4K]3 years ago
5 0
$66.80 - 15 = $51.80

$51.80 divided by 4 =

$12.95

So each book costs $12.95
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How to find the inter quartile range of these <br><br> 1,1,1,2,2,3,3,4,5
Anna007 [38]

Answer:

2.5

Step-by-step explanation:

1st Quartile (Q1): 1

2nd Quartile (Q2): 2

3rd Quartile (Q3): 3.5

IQR = Q3 - Q1 = 3.5 - 1 = 2.5

5 0
3 years ago
Graph -5, 0, 2,and 4 on a numberline
Elena-2011 [213]

Answer:

That's the way it should be graphed

4 0
3 years ago
in 15 years Pam hope to have $30,000to make a down payment on a house. how much would she need to invest right now in a mutual f
Goryan [66]

Answer:

She needs to invest $13,636.36 right now

Step-by-step explanation:

This is a simple interest problem.

The simple interest formula is given by:

E = P*I*t

In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.

After t years, the total amount of money is:

T = E + P

In this question:

In 15 years, so t = 15

She wants to have $30,000, so T = 30000

8% interest, so I = 0.08

We have to find P.

T = E + P

30000 = E + P

E = 30000 - P

Replacing:

E = P*I*t

30000 - P = P*0.08*15

30000 - P = 1.2P

2.2P = 30000

P = \frac{30000}{2.2}

P = 13636.36

She needs to invest $13,636.36 right now

5 0
3 years ago
The height of a pyramid is doubled, but its length and width are cut in half. What is true about the volume of the new pyramid?
Aleksandr [31]

Answer:

The new pyramid has a volume that is half the volume of the original pyramid.

Step-by-step explanation:

The volume of a pyramid is given by the following equation:

V = \frac{h*l*w}{3}

In which h is the height, l is the length and w is the width.

Modified volume:

height doubled, length and width cut in half. So

h = 2h, l = 0.5l, w = 0.5w

V_{M} = \frac{2h*0.5l*0.5l}{3} = \frac{0.5*h*l*w}{3} = 0.5\frac{h*l*w}{3} = 0.5V[/tex]

That is

The new pyramid has a volume that is half the volume of the original pyramid.

6 0
3 years ago
A 12-ft ladder leaning against a house makes a 64 degree angle with the ground. Will the ladder reach a window sill that is 10.5
Luba_88 [7]

Answer:

Yes, it will

Step-by-step explanation:

Given

Length of Ladder = 12 ft

Angle = 64

Required

Determine if it'll reach a height of 10.5ft from the base

See attachment for proper illustration.

<em>From the attachment, we want to determine that x be greater than 10.5</em>

Using sin formula:

Sin\ 64 = \frac{x}{12}

Multiply through by 12

x = 12 * sin\ 64

x = 12 * 0.8988

x = 10.79 (Approximated)

<em>Since 10.79 is greater than 10.5, then the ladder will reach the window</em>

sin64 = x/12

x = 12* sin64

5 0
2 years ago
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