Provide an appropriate response.In the linear function, y = 12 + 21x, 12 is the ? of the function.
A. y-intercept
B. slope
C. domain
D. x-intercept
Answer: A
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Provide an appropriate response.It took 28 seconds for the temperature to rise from 5° F to 135° F when a thermometer was taken from a freezer and placed in boiling water. Although we do not have detailed knowledge about the rate of temperature increase, we can know for certain that, at some time, the temperature was increasing at a rate of 
° F/sec. Explain.
What will be an ideal response?
Perform the indicated operation. Express the answer in scientific notation.(5.3 × 107)(8 × 10-8)
A. 4.24 × 100 B. 4.24 × 10-2 C. 42.4 × 10-1 D. 4.24 × 10-1
Convert. Round to the nearest tenth of a degree, if necessary.117.1°C to degrees Fahrenheit
A. 178.8°F B. 97.1°F C. 242.8°F D. 33.1°F
Solve the problem.An arch in the form of a semiellipse is 52 ft wide at the base and has a height of 20 ft. How wide is the arch at a height of 12 ft above the base?
A. 17.7 ft B. 20.8 ft C. 41.6 ft D. 35.5 ft