A scientist is measuring the temperature change in a medical compound the temperature dropped 11 Fahrenheit per hour from the original temperature after four hours of temperature was 90 in Fahrenheit find the compounds original temperature

the original temperature is

123 °Fahrenheit

Step-by-step explanation:

The temperature dropped 11 Fahrenheit per hour from the original temperature. This means that the rate at which it is dropping is in arithmetic progression.

The formula for determining the nth term of an arithmetic sequence is expressed as

Tn = a + d(n - 1)

Where

a represents the first term(original temperature) of the sequence.

d represents the common difference.

n represents the number of terms(hours) in the sequence.

From the information given,

d = - 11 degrees (it is decreasing)

When n = 4 hours, T4 = 90

We want to determine the value of the first term, a. Therefore,

T4 = 90 = a - 11(4 - 1)

90 = a - 11 × 3

90 = a - 33

a = 90 + 33

a = 123 °Fahrenheit

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

12m

step-by-step explanation:

square root means have of a number so have of 3 is 1.5 then multiply it by 8 and you get your answer!