Express the number in scientific notation.0.0000004
A. 4 × 10-6
B. 4 × 10-8
C. 4 × 10-7
D. 4 × 10-9
Answer: C
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Solve the problem.The range R of a projectile is related to the initial velocity v and projection angle ? by the equation 
where g is a constant. How is 
related to 
and 
if neither v nor ? is constant?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Find all cube roots of the complex number. Leave answers in trigonometric form.2 + 2i
A. 
cis 20°, 
cis 140°, 
cis 260°
B. 
cis 20°, 
cis 140°, 
cis 260°
C. 
cis 30°, 
cis 150°, 
cis 270°
D. 
cis 20°, 
cis 140°, 
cis 260°
A point P(r, ?) in polar coordinates is given. Determine the rectangular coordinates P(x, y).
A. 
B. 
C. 
D. 
Translate the problem situation to a system of equations. Do not solve.Sarah Comar's Candy Store sold 15 individual pounds of jelly beans, one kind at $4.27 per pound and the other at $0.87 per pound. In all, $36.85 was taken in for the two types of jelly beans. How many pounds of each kind were sold?
A. x + y = 5.14; 4.27x + 0.87y = $36.85 B. x + y = 15; 4.27x + 0.87y = $36.85 C. x + y = 15; 5.14x + y = $36.85 D. x + y = 36.85; 4.27x + 0.87y = $15