Evaluate the expression using the given value of the variables.-3x2 + 5y2 for x = 2, y = 2
A. 14
B. -32
C. -2
D. 8
Answer: D
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Write a chain rule formula for the following derivative.
for u = f(p, q); p = g(x, y, z), q = h(x, y, z)
A. 
= 
+ 
+ 
B. 
= 
C. 
= 
+ 
D. 
= 
+ 
Use a calculator with a 
key to solve the problem.The function f(x) = 90e-0.2x + 10 models the percentage of information, f(x), that a particular person remembers x weeks after learning the information. a) Substitute 0 for x and, without using a calculator, find the percentage of information remembered at the moment it is first learned. b) Find the percentage of information that is remembered after 4 weeks. Round to the nearest thousandth of a percent.
A. a) 10%; b) 10.449% B. a) 50%; b) 210.299% C. a) 90%; b) 40.440% D. a) 100%; b) 50.440%
Divide. Leave your answer in exponent form. Assume that all variables in any denominator are nonzero.
A. s10t11 B. s6t9 C. s6t10 D. s6t8
Find the Social Security and Medicare taxes on the gross earnings. Assume a 6.2% FICA rate and a 1.45% Medicare rate. Round to the nearest cent.$411.30
A. $255.00, $59.60 B. $2.55, $0.60 C. $25.50, $5.96 D. $26.50, $6.96