Find the difference. Write the difference in lowest terms.
- 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find the curvature ? for the given function.r(t) = (3t sin t + 3 cos t)i + 3j + (3t cos t - 3 sin t)k
A. ? = 3t
B. ? = - 
C. ? = 
D. ? = 
Mathematics
Find the unknown value.What percent of 70 is 56?
A. 120% B. 125% C. 75% D. 80%
Mathematics
Solve the problem.The paired data below consist of the temperatures on randomly chosen days and the amount a certain kind of plant grew (in millimeters). By using linear regression, the following function is obtained: 
where x is temperature and y is growth in millimeters. Use this function to predict the growth of a plant if the temperature is 59.
A. 27.05 B. 27.52 C. 27.99 D. 25.81
Mathematics
Combine like terms.-2b + 5b
A. 3b B. 3b2 C. -3b D. -7b
Mathematics