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$$a = 1,052 + 1.08t$$
The speed of sound wave depends on the air temperature. The formula above shows the relationship between a, the speed of a sound wave, in feet per second, and t, the air temperature, in degrees Fahrenheit (°F).
At which of the following air temperatures will the speed of a sound wave be closest to 1,000 feet per second?
Lena bought a saltwater fish tank that holds 400 gallons of water. She started filling the tank on Friday, but then stopped after putting only 70 gallons of water in the tank. On Saturday, she bought a bigger hose and began filling the tank again. It took her 1 hour and 50 minutes on Saturday to completely fill the tank. Which equation represents the number of gallons of water in the fish tank on Saturday, given the amount of time in minutes that Lena spent filling the tank?
Human beings have a resting heart rate and an active heart rate. For a fairly active woman in her 20’s, eight minutes of moderate exercise results in a heart rate of about 90 beats per minute. After 20 minutes, the same Woman’s heart rate will be about 117 beats per minute. If the human heart rate increases at a constant rate as the time spent exercising increases, which of the following linear models represents this same woman’s heart rate, r, after t minutes of moderate exercise?
During any school assembly, the number of students engaging in social media on their phones can be represented by a linear relationship expressed by \(y=4x+1\), where y represents the number of students on their phones on social media and x represents the number of minutes since the monotone speaker has begun talking. Which of the following is the best interpretation of the number \(4\) in this context?
Your fondness of your Crimson Review SAT teacher can be represented by the linear expression \(y=2x-1\), where y represents the positive experience you have had and x represents the number of hours you have spent reviewing our game-breaking materials with your teacher. Which of the following is the best interpretation of the number \(-1\) in this context?
Margaret makes bowls using clay. Margaret’s bowl-making abilities can be represented by the equation \(y=3x-1\), where y is the number of bowls that she makes and x is the amount of pounds of clay that Margaret has. After Margaret makes her first bowl, how many additional pounds of clay are required for Margaret to make each additional bowl?