Answer:
The height is 20 cm.
Step-by-step explanation:
First, we have to know that the volume formula is V = πr²h and the base area of cylinder is a circle. So we can let πr² be 77 cm² . Then we have to substitute the following values into the formula :



Let πr² be 77,
Let v be 1540,




Method 1:
4(754)
=4(700+50+4)
=2800 + 200 + 16
=3000+16
=3016
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Method 2:
4(754)
=4(250+250+250+4)
=1000+1000+1000+16
=3016
Answer:
b
Step-by-step explanation:
a) 75 percent of the regular price is the price for senior citizens.
b) $6.712 is the price for senior citizens.
<u>Step-by-step explanation</u>:
- The regular price is the 100% = $8.95
- The offer price for senior citizen = 15% discount from 100%
∴ Percent of the regular price for senior citizens = 100% - 15% = 75%
The price for the senior citizens = 75% of $8.95
⇒ (75/100)
8.95
⇒ 0.75
8.95
⇒ 6.712 dollars.
∴ The price for senior citizens = $6.712