A stone is dropped into a well and the report of the stone striking the bottom is heard 7.7 seconds after it is dropped. Assume that the stone falls 16t2 feet in t seconds and that the velocity of sound is 1,120 feet per second. The depth of the well is:
May 2021
If $a^x = c^q = b$ and $c^y = a^z = d$, then:
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The value of $10^{\log_{10} 7}$ is:
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The pressure P of wind on a sail varies jointly as the area A of the sail and the square of the velocity V of the wind. The pressure on a square foot is 1 lb when the velocity is 16 mph. The velocity of the wind when the pressure on a square yard is 36 lbs is:
The value of $x$ in the equation $\log_{10} (x^2 - 15x) = 2$ are:
When simplified and expressed with negative exponents, the expression $(x + y)^{-1}(x^{-1} + y^{-1})$ is equal to:
Indicate in which one of the following equations y is neither directly nor inversely proportional to x:
The largest number by which the expression $n^3 - n$ is divisible for all possible values of $n$, is:
Alvin can do a piece of work in 9 days. Briggs is 50% more efficient than Alvin. The number of days it takes Briggs to do the same piece of work is:
At 2:15 o'clock, the hour and minute hands of a clock form an angle of: