This no-calculator prompt is from the Daily Practice app:
Lisa gives her little brother Sam a 15-second (sec) head start in a 300-meter (m) race. During the race, Sam runs at an average speed of 5 m/sec and Lisa runs at an average speed of 8 m/sec, not including the head start.
Which of the following best approximates the number of seconds that had passed when Lisa caught up to Sam?
A. 5
B. 25
C. 40
D. 55
This no-calc prompt is from the Daily Practice app:
The temp T in °C of a chilled drink after the drink has been sitting on a table for m min is represented by T(m) = 32 – 28*3^(-0.05m).
What is the best interpretation of the # 32 in this context?
A. The drink is originally 32°C.
B. Every 32 min, the temperature warms by 3°C.
C. After 32 min, the drink will fully warm to the ambient temp.
D. After the drink has been sitting for a very long time, the temp of the drink will approach 32°C.
