Provide an appropriate response.Starting with a tone having a frequency of 687 cycles per second, find the frequency of the tone that is two octaves higher.
A. 471,969 cps
B. 1374 cps
C. 2748 cps
D. 5496 cps
Answer: C
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The grade of a highway up a hill is 25%. How much change in horizontal distance is there if the vertical height of the hill is 150 feet? Express the answer to the nearest foot.
A. 619 ft B. 600 ft C. 500 ft D. 610 ft E. 575 ft
Use the pH scale to answer the question.If the pH of a solution decreases by 3.4, how much does the hydrogen ion concentration change? Does the change make the solution more acidic or more basic?
A. Increases by a factor of 34; more acidic B. Decreases by a factor of 34; more basic C. Increases by a factor of 2512; more acidic D. Decreases by a factor of 2512; more basic
Rationalize the denominator and simplify. Assume all variables represent nonnegative real numbers.
A. 
B. 
C. 
D. 3x
Write the phrase as a variable expression. Use x to represent "a number."A number subtracted from 35
A. x - 35 B. 35 C. 35x D. 35 - x