39.0k views
3 votes
A scientist is measuring the temperature change and a chemical compound the temperature dropped 11 Fahrenheit per hour from the original temperature after four hours the temperature was 90°F find the compounds original temperature

User Yngling
by
6.7k points

2 Answers

6 votes
Since the day started with 90F then every hour it dropped 11F. So if it dropped 11F every hour for four hours it is 46F
User Oleg Levin
by
7.2k points
3 votes

Answer: 134°F

Explanation:

Given : A scientist is measuring the temperature change and a chemical compound the temperature dropped 11° Fahrenheit per hour from the original temperature .

Let x be the original temperature.

Then , the compound temperature after t hours is given by :_


y=x-11t

At t= 4 hours and x= 90°F, we have


90=x-11(4)\\\\\Rightarrow\ x-44=90\\\\\Rightarrow\ x=90+44=134

Hence , the compounds original temperature = 134°F

User Oded Harth
by
6.1k points