A scientist is measuring the temperature change in a chemical compound. The temperature dropped 11F per hour from the original temperature. After 4 hours, the temperature was 90 F. Find the compound's original temperature.

134F

Step-by-step explanation:

Let C represent temperature and t represent number of hours.

We have been given that the temperature dropped 11 F per hour from the original temperature. So temperature dropped in t hours would be .

We will represent our given equation in slope-intercept form:

, where b is initial temperature of compound.

We have been given that after 4 hours, the temperature was 90 F. This means point in on the line. So we will get:

Therefore, the original temperature of the compound is 134F.

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.