Question9 At practice, Cadesia swims 2 laps every 5 minutes. If she continues to swim at a constant rate, which method could be used to determine the number of minutes it takes her to swim 12 laps?
A Multiply 12 by 2.5
B Multiply 12 by 5
C Divide 12 by 2.5
D Divide 12 by 10

Studdy Solution
Solve the proportion to find the correct method.
Cross-multiply to solve for $t$:
$$2t = 5 \times 12$$
$$2t = 60$$
Divide both sides by 2 to solve for $t$:
$$t = \frac{60}{2}$$
$$t = 30$$
To find the method that matches this calculation, notice that multiplying 12 by 5 gives us 60, which when divided by 2 (since she swims 2 laps in 5 minutes), gives us 30 minutes.
Therefore, the correct method is:
B Multiply 12 by 5