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.

he has now walked a total of what?

if i know what this is maybe i can

step-by-step explanation:

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.