Multiply.(7x2 - 6x)(7x2 + 6x)
A. 49x4 - 36x2
B. 7x4 - 6x2
C. 49x4 + 84x3 - 36x2
D. 49x4 - 84x3 - 36x2
Answer: A
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Rewrite each number using scientific notation before performing the operation. Leave your answer in scientific notation form.
-5
A. 2.00 × 10-21 B. 3.13 × 10-18 C. 3.13 × 1078 D. 2.00 × 1011
Solve the problem.A home has a living room that is 15 ft wide and 21 ft long. The height is 9 ft. Bob needs to paint the room. He has to paint the walls and the ceiling. (He will not paint the floor.) There are two 3.0 ft by 5.0 ft windows and a 4.0 ft by 7.0 ft opening into the room that will not be painted. A gallon of paint covers 320 ft2. How many gallons of paint are needed? (All data are accurate to two significant figures.)
A. 2.8 gallons B. 3.0 gallons C. 1.8 gallons D. 3.8 gallons
Identify the abuse of statistics."7 out of 10 dentists recommend Brand X toothpaste". This finding is based on the results of a survey of 10 randomly selected dentists. What is wrong with this survey?
What will be an ideal response?
Solve the inequality. Write the solution set in interval notation.x2 - 6x ? -8
A. [2, 4] B. (-?, 2] C. [4, ?) D. (-?, 2] ? [4, ?)