There are three traffic lights on the road. The probability that a car will stop at any of them is 0.7. Find the expectation that the car will drive through all of them.
a. 0.561
b. 2.1
c. 0.027
d. 0.233
a. 0.561
Mathematics
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Find the vector projv u.v = 3j, u = 4i + 3k
A. 
i + 
j + 
k
B. 
j
C. 
i + 
j
D. 0
Mathematics
Solve.When Maria finished medical school she owed $51,000 in student loans. She repaid 
of the total amount within two years of graduating. How much did she repay within two years of graduating?
A. $11,475 B. $14,025 C. $12,750 D. $1,275
Mathematics
Solve the equation.-16 = -9x - 7
A. 8 B. 1 C. 0 D. 4
Mathematics
Find the area of the parallelogram.P1 (1, 2, 0), P2 (-3, 3, 4), P3 (0, -3, 3)
A. 
B. 
C. 
D. 9
Mathematics