You can send only 23 texts, when you are only able to spend $28.
1. Calculate how many hours passed between her temperature checks. 8 p.m to 8 a.m. is 12 hours.
2. Calculate the total change in temperature. 36 - 54 is -18, so the temperature went down by 18 degrees.
3. We are looking for degrees per hour, so we put derees(18) over hours (12) to get 18/12.
4. Calculate by dividing. The answer is 1.5 degrees per hour.
The reciprocal of a fraction is just that fraction flipped.
So the reciprocal of 1/12 would be 12/1.
