There were 550 people at a play. The admission price was $2 for adults and $1 for children. The admission receipts were $810. How many adults and how many children attended?
A. 202 adults and 348 children
B. 290 adults and 260 children
C. 145 adults and 405 children
D. 260 adults and 290 children
Answer: D
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Add.
A. 11,627 B. 10,617 C. 10,527 D. 10,627
Write a chain rule formula for the following derivative.
for w = f(x, y, z); x = g(r, s, t), y = h(r, s, t), z = k(r, s, t)
A. 
= 
+ 
B. 
= 
+ 
+ 
C. 
= 
+ 
+ 
D. 
= 
+ 
+ 
Solve the problem.Given the velocity and initial position of a body moving along a coordinate line at time t, find the body's position at time t.v = 
sin 
, s(?2) = 2
A. s = -2 cos 
+ 4
B. s = -2 cos 
+ 3
C. s = 2 cos 
+ 4
D. s = -2 cos 
+ 8
At one high school, the mean time for running the 100-yard dash is 
with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Less than 15.2 seconds
A. 68% B. 50% C. 16% D. 34%