vivox3tSAT数学练习15

2020年11月25日发(作者：庄公惠)


1. The graph at left in the sm-plane approximates the average mileage, mm, in miles per
gallon, that Deniz's pickup truck gets when she drives at a speed of s miles per hour. What
is the best interpretation of the maximum point on the graph?

A. Deniz's truck gets a maximum mileage of 18 miles per gallon.
B. Deniz's truck gets a maximum mileage of 55 miles per gallon.
C. Deniz's truck can drive at a maximum speed of 18 miles per hour.
D. Deniz's truck can drive at a maximum speed of 55 miles per hour.



2. A laptop battery gains cell voltage as it charges. The battery initially charges quickly, then
gradually slows as it approaches its maximum charge. Which of the following graphs in
the tv-plane could represent the total cell voltage, v, in a laptop battery after t minutes of
charging time?

A.
B.
C.
D.






3. The graph at left in the yI-plane shows the interest rate percentage, I, one can expect for a
savings account lasting y years up to a maximum of 10 years. Accounts lasting for less
than 1 year are short-lived and accounts lasting for more than 5 years are long-lived.
What is the significance of the I-intercept?

A. Short-lived accounts have the minimum interest rate of 6percent.
B. Long-lived accounts have the minimum interest rate of 6percent.
C. Long-lived accounts have the maximum interest rate of 11percent.
D. The average increase in interest rates is 0.5 percent per year.










4. The graph at left in the th-plane shows Brayden's height, h, in inches above the
ground, t seconds after he jumps. What is the best interpretation of the t-intercepts of the
graph?

A. Brayden jumped 0.6 feet into the air.
B. Brayden jumped 0.6 times per second.
C. Brayden remained in the air for 0.6 seconds.
D. Brayden reached the peak of his jump after 0.6 seconds.












5. The graph at left in the th-plane shows the function used to model the height, h, in feet of
the top of a pool toy above the surface of the water t seconds after the toy has been
thrown toward the water's surface. How many seconds after the toy had been thrown did
the pool toy resurface?

A. 0.1 seconds
B. 0.6 seconds
C. 1.1 seconds
D. 5 seconds











6. The graph at left in the th-plane represents the height, h, in feet above the ground, of a
baseball t seconds after Manon has thrown it. Which of the following is the best
interpretation of the portion of the graph below the t-axis?

A. It represents the heights before Manon threw the ball.
B. It represents distances of the baseball below the ground.
C. It is irrelevant, because the ball will not continue descending below the ground.
D. It is irrelevant, because the heights did not follow the same pattern before Manon threw
the ball.











7. The graph at left in the EH-plane shows how mixing 3 milliliters of ethanol and water at
different concentrations can release different amounts of heat, where E is the percent
concentration of ethanol and H is the amount of heat released in joules (J). To the
nearest 5 J, what is the largest amount of heat that can be released with 3 milliliters of
ethanol and water?









Sample answers list:
an integer, like 6
a simplified fraction number, like 3/5
a simplified improper fraction, like 7/4
an exact decimal, like 0.75


8. The graph at left shows the antibody production, a, in number of antibodies per
hour h hours after the introduction of a vaccine. What is the maximum number of
antibodies produced per hour?















Sample answers list:
an integer, like 6
a simplified fraction number, like 3/5
a simplified improper fraction, like 7/4
an exact decimal, like 0.75