Solve.An airplane is flying west at an altitude of 34,290 feet. Another plane is flying north at an altitude of 30,798 feet. How much above the 
plane is the 
plane when their paths cross?
A. 3692 feet
B. 3422 feet
C. 3492 feet
D. 3462 feet
Answer: C
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Change the order of integration and evaluate the integral.
A. 
?2
B. 
?
C. 
?2
D. 
?
A sociologist has found that the number of serious crimes in a certain city each year is described by the function 
where x (in cents/dollar deposited) is the level of reinvestment in the area in conventional mortgages by the city's ten largest banks. Use differentials to estimate the change in the number of crimes if the level of reinvestment changes from 21
src="https://sciemce.com/media/3/ppg__cognero__3.7_Differentials__media__307e533a-5161-4904-9f41-92f1713b8891.PNG" style="vertical-align: middle;" />/dollar deposited to 25
/dollar deposited. Round to the nearest integer.
?
Decrease of __________ crimes/yr.
Fill in the blank(s) with the appropriate word(s).
Use substitution to factor the trinomial.15x4 - 13x2 - 20
A. (3x2 + 1)(5x2 - 20) B. (15x2 - 5)(x2 + 4) C. (3x2 - 5)(5x2 + 4) D. (5x - 4)(3x + 5)
Solve the problem.One cook can make enough food for 350 people a night. How many cooks are needed to feed 3150 people a night?
A. 9 cooks B. 8 cooks C. 10 cooks D. 7 cooks