Solve the problem.A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 3% cement should he mix with 4 bags of 16.5% cement to produce a mix containing 9% cement?
A. 7 bags
B. 14 bags
C. 9 bags
D. 5 bags
Answer: D
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Solve the problem.In a right triangle, the sum of the two acute angles can be represented by the formula a + b = 90°. Find the measure of the missing angle of one of the angles measures 22°.
A. 68° B. 112° C. 158° D. 38°
Simplify the expression.4(x + 4) - 16
A. 16x B. 4x C. x + 16 D. 4x + 4
True or false?The union of the set of rational numbers and the set of integers is the set of rational numbers.
A. True B. False
Provide an appropriate response.You have two investment opportunities. You can invest $6000 at 12% compounded monthly or you can invest $6100 at 12.1% compounded quarterly. Which has the better effective rate of interest? Use a graphing calculator to graph both amounts as a function of time in years. Which is the better investment over twenty years?
What will be an ideal response?