Solve the problem. Use 3.14 as the approximate value of ? unless otherwise instructed. Round to the nearest tenth unless otherwise indicated.A homeowner's heating oil storage tank is in the shape of a right circular cylinder with a diameter of 4 feet and a height of 7 feet. If there are 231 cubic inches in a gallon of oil and the oil costs the homeowner $1.49 per gallon, how much will it cost to fill the tank? Round your answer to the nearest cent.
A. $979.95
B. $6.81
C. $131.00
D. $81.66
Answer: A
Mathematics
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The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (8 sin 2t)i - (10 cos 2t)j + (7 csc 2t)k
A. a
= 32i + 28k
B. a
= -32i + 28k
C. a
= 40j + 28k
D. a
= -32i - 28k
Mathematics
Suppose that y is inversely proportional to x. Use the given information to find the constant of proportionality k. Then use y = 
to find y for the given value of x.y = 2.5 when x = 5;
Find y given x = 16.
A. k = 5; y = 
B. k = 0.5; y = 8
C. k = 12.5; y = 
D. k = 2.5; y = 
Mathematics
Perform the necessary operations.-2 + 12 - (-17) - 20
A. 13 B. 7 C. 47 D. -11
Mathematics
Perform the division.
A. 3x2 + 2x - 1 + 
B. 3x2 + 2x - 1
C. 3x2 + 2x - 1 + 
D. x2 - 1 + 
Mathematics