Solve the problem.A consumer group in one city compares the costs of goods and services in that city over various years, and uses 1970 as a base. The same goods and services that cost $100 in 1970 cost $37 in 1941. Assume the exponential-decay model in which t is the number of years before 1970. Estimate what the same goods and services cost in 1900. (You will need to find the value of k)
A. $11
B. $1080
C. $8
D. $9
Answer: D
Mathematics
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Find the equation for the level surface of the function through the given point.f(x, y, z) = 
+ 
, (4, e6, e-4)
A. -5e-4 - 5e6 + 3e4 + 1 = 
+ 
B. -4e-4 - 6e6 + 3e4 - 9 = 
+ 
C. -4e-4 - 6e6 + 3e4 + 1 = 
+ 
D. -4e-4 - 6e6 + 3e4 + 1 = ln ? + 1 + t et
Mathematics
Find the product.3(7x)
A. 10x B. 10 C. 21 D. 21x
Mathematics
Solve the problem.If you are dealt two cards successively (with replacement of the first) from a standard 52-card deck, find the probability of getting a heart on the first card and a diamond on the second.
A. 
B. 
C. 
D. 
Mathematics
Find the volume of the solid. Use 
for ?.
A. 405 cu mi
B. 22
cu mi
C. 135 cu mi
D. 202
cu mi
Mathematics