Answer:
Volume = 1539.38 cm³
Surface Area = 747.7 cm²
Step-by-step explanation:
Volume = πr² h
V = π(7)²(10)
V = π(49)(10)
V = 490π
V = 1539.38 cm³
Surface Area = 2πrh + 2πr²
SA = 2π(7)(10) + 2π(7)²
SA = 2π(70) + 2π(49)
SA = 140π + 98π
SA = 238π
SA = 747.7 cm²
Answer:
Step-by-step explanation:
<span>2|3y-8|+y if y =2.5
</span><span>2|3(2.5)-8|+2.5
</span><span>2|7.5-8|+2.5
</span><span>2(0.5)+2.5
</span>1+2.5
=3.5
Using proportions, the estimate of the population percentage of seniors that will say they are going to the graduation party is of 62.5%.
<h3>What is a proportion?</h3>
A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.
The estimate of a population proportion is the sample proportion. In this problem, the sample proportion is of 75 out of 120 students, hence:
p = 75/120 = 0.625 = 62.5%.
The estimate of the population percentage of seniors that will say they are going to the graduation party is of 62.5%.
More can be learned about proportions at brainly.com/question/24372153
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