Use your graphing calculator to find the x-intercepts of the function to the nearest tenth.f(x) = 3x3 + x2 - 21x - 7
A. 0.3, 2.6, -2.6
B. -3, 2.7, -2.7
C. -0.3, 2.6, -2.6
D. 3, 7, -7
Answer: C
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Solve the problem.Find the lateral surface area of a right circular cone with a radius of 55.3 cm and a slant height of 93.7 cm.
A. 25,900 cm2 B. 300,000 cm2 C. 16,300 cm2 D. 8140 cm2
Find the value of df-1/dx at x = f(a).f(x) = 
x + 9, a = 3
A. 
B. 9
C. 
D. 4
Use the compound interest formulas A = P
nt and 
to solve.Suppose that you have $3,000 to invest. Which investment yields the greater return over 5 years: 7.5% compounded continuously or 7.6% compounded semiannually?
A. $3,000 invested at 7.5% compounded continuously over 5 years yields the greater return. B. Both investment plans yield the same return. C. $3,000 invested at 7.6% compounded semiannually over 5 years yields the greater return.
Simplify.2.5x - 3.2 - 1.3x - 9.5
A. 1.2x + 6.3 B. 3.8x - 30.4 C. 1.2x - 12.7 D. -11.5x