3 years ago

Elaine has a $25 gift card. She uses the card each

Mathematics

2 answers:

Anit [1.1K]3 years ago

8 0

Answer:

$0.50

Step-by-step explanation:

multiply 3.50 by 7 and you get 24.5. $25.00-$24.50= $0.50

Anna35 [415]3 years ago

4 0

Answer:

0.5

Step-by-step explanation:

Well lets start with a basic equation.

$25=3.50(7)

25= 24.5 multiply 3.50 and 7

25-24.5=0.5 subtract the total from the whole

After using the card for 7 months she will have 5 cents left on her card.

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Answer:

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A sphere has a volume of V=900 in cubed. What is the surface area?

ycow [4]

First, we must solve for the radius of the sphere:
V= $\frac{4}{3}$ $\pi$ $r^{3}$
r=(3 $\frac{V}{4 \pi }$ ) $^{ \frac{1}{3} }$
r=(3* $\frac{900}{4 \pi }$ ) $^{ \frac{1}{3} }$
r≈5.99

Second, we must solve for surface area:
A=4 $\pi$ $r^{2}$
A=4* $\pi$ * $5.99^{2}$
A≈450.88 $in^{2}$