Answer:
2,175 calories
Step-by-step explanation:
140 pound person will use 2100 calories per day
145 pounds person will use x calories per day
Find x
Pounds : calories
140 : 2100 = 145 : x
140/2100 = 145/x
Cross product
140 * x = 2100 * 145
140x = 304,500
Divide both sides by 140
x = 304,500 / 140
= 2,175
Therefore,
145 pounds person will use 2175 calories per day
Answer:
He determined pounds per dollar by dividing 10 by 25 but wrote the unit rate as a dollar value.
Step-by-step explanation:
Given
Required
Determine Ming's error
Ming's error is from here
He calculated the unit rate as pound per dollar.
So, after calculating the unit rate, the unit should be:
But instead, he solved as:
<em>Hence, (a) is correct</em>
T is a linear function of C ==> T = mC + b
Each additional chirp C corresponds to an increase in T of 0.25 ==> m = 0.25
T = 52 when C = 20 ==> 52 = 0.25(20) + b ==> b = 52 - 5 = 47
So T = 0.25C + 47
When C = 100 then T = 0.25(100) + 47 = 25 + 47 = 72
When C = 120 then T = 0.25(120) + 47 = 30 + 47 = 77 so the
temperature range is between 72 and 77 when there are between 100 and
120 chirps per minute
