Question

select the correct answer from each drop - down menu. let d(t) be the total number of miles joanna has cycled, and let t represent the number of hours before stopping for a break during her ride. d(t) = 12t + 20 so, d(4) = . this means that after , joanna . the options for d(4) are 32, 88, 96, 68

Explanation:

Step1: Substitute t = 4 into d(t)

We have the function \( d(t) = 12t + 20 \). To find \( d(4) \), we substitute \( t = 4 \) into the function. So we get \( d(4)=12\times4 + 20 \).

Step2: Calculate the value

First, calculate \( 12\times4 = 48 \), then add 20: \( 48+20 = 68 \). So \( d(4) = 68 \). Then, since \( t \) represents the number of hours before stopping for a break, after 4 hours, Joanna has cycled 68 miles.

Answer:

For \( d(4) \), the value is 68. The first drop - down (for \( d(4) \)) should be 68. The second drop - down (the time) should be "4 hours", and the third drop - down (what it means) should be "has cycled 68 miles".