Write the complex number in polar form. Express the argument in degrees, rounded to the nearest tenth, if necessary.-4i
A. 4(cos 90° + i sin 90°)
B. 4(cos 0° + i sin 0°)
C. 4(cos 270° + i sin 270°)
D. 4(cos 180° + i sin 180°)
Answer: C
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Solve.In a distant galaxy the gravity of planet A is 218 times as strong as the gravity of planet B, so objects on planet A weigh 218 times as much as they weigh on planet B. If the object weighs 
on planet A, how much does it weigh on plant B?
A. 1670 lb B. 177 lb C. 167 lb D. 160 lb
Solve the problem.In 1995, 2.3 million cubic feet of methane gas were added to the atmosphere, and the amount was growing at a rate of 1% per year. How much methane will be in the atmosphere in the year 2000?
A. 14 million cubic feet B. 7.5 million cubic feet C. 10.6 million cubic feet D. 11.8 million cubic feet
Solve the problem.A toilet manufacturer has decided to come out with a new and improved toilet. The fixed cost for the production of this new toilet line is $16,600 and the variable costs are $67 per toilet. The company expects to sell the toilets for $159. Formulate a function C(x) for the total cost of producing x new toilets and a function R(x) for the total revenue generated from the sales of x toilets.
A. C(x) = 16600 + 67x; R(x) = 159x B. C(x) = 16600 + 159x; R(x) = 67x C. C(x) = 16,667; R(x) = 159 D. C(x) = 67x; R(x) = 159x
Solve.
+ 
= - 
A. x = 
B. x = - 
C. x = - 
D. x = - 