4.04 Real-world problems with integers
Interactive practice questions
Maximilian is going to cook a pot roast. He turns the oven on to warm it up. He puts the pot roast in the oven $15$15 minutes later when it is at the right temperature. The pot roast is ready $120$120 minutes after Maximilian first turned the oven on.
Which of the following expressions could we use to calculate the baking time of the pot roast?
$15+120$15+120
$-15+120$−15+120
$15-120$15−120
$-15-120$−15−120
How long did the pot roast bake for?
A bird soaring at a height of $25$25 m above sea level sees a school of fish and dives down a distance of $32$32 m. How far below sea level does the bird reach?
A bus departs the depot with $16$16 passengers on board.
At the first stop, $7$7 people got off and $11$11 people got on. At the second stop, another $5$5 people got off and $14$14 more got on.
How many people are on the bus when it leaves the second stop?
William arrives to a meeting $15$15 minutes early, and he leaves as soon as the meeting ends, $75$75 minutes after he got there.