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Over [174]
2 years ago
13

Freddie needs to buy 3 dozen cookies for a party. The first 20 cookies cost $0.27 each. The rest cost $0.17 each.

Mathematics
1 answer:
yarga [219]2 years ago
8 0

Answer:

8.12 is the answer

Step-by-step explanation:

He needs 36 cookies.

First do 20 * .27 for the first twenty

then do 16 * .17 for the other 16 cookies

Add 5.4 + 2.72 = 8.12

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Grace sold 5/8 of her stamp collection what is this amount as a decimal
fenix001 [56]
0.625
divide 5 by 8 is 0.625 rounded would be 0.63
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3 years ago
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Plutonium-240 decays according to the function where Q represents the quantity remaining after t years and k is the decay consta
taurus [48]
Note: a radioactive decay constant is always negative.

time = [natural log(ending amount / beginning amount)] / k
time = ln (20 / 24) / -.00011
time = ln (5/6) / -.00011
time = -.018232155683 / -.00011
time = <span> <span> <span> 165.7468698455 </span> </span> </span>
time = <span> <span> <span> 165.75 years

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7 0
3 years ago
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Find the volume of the hemisphere below leave your answers in terms of pi
Ainat [17]

Answer:

volume of the hemisphere

\frac{2}{3}  \times \pi \times  {r}^{3}  \\  \frac{2}{3} \times \pi  \times  1331 \\  = 887.3333333333\pi

7 0
2 years ago
Which word best describes the range of a function?
cluponka [151]
The answer to the question is D
7 0
3 years ago
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Simplify without using the calculator or the sin tables.​
katovenus [111]

Answer:

1/8

Step-by-step explanation:

sin²(π/8) − cos⁴(3π/8)

Use power reduction formulas:

1/2 (1 − cos(2×π/8)) − 1/8 (3 + 4 cos(2×3π/8) + cos(4×3π/8))

Simplify:

1/2 (1 − cos(π/4)) − 1/8 (3 + 4 cos(3π/4) + cos(3π/2))

1/2 (1 − √2/2) − 1/8 (3 + 4 (-√2/2) + 0)

1/2 − √2/4 − 1/8 (3 − 2√2)

1/2 − √2/4 − 3/8 +√2/4

1/2 − 3/8

1/8

7 0
3 years ago
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