Answer this question:A book costs $4 more than a CD. The CD is 30% cheaper than a $20 album. How much does the book cost?
The CD is 30 / 100 * 20 = $6 cheaper than the album. So the cost of the CD is 20 - 6 = $14. The book is $4 more expensive than the CD, which means it cost 14 + 4 = $18.
The answer is 18.

Answer this question:A hurricane is approaching the southern coast of Texas, and a rancher is planning to move 400 head of cattle 60 miles to higher ground to protect them from possible inland flooding that might occur. His animal transport truck holds 20 head of cattle. Traveling at 60 miles per hour, what is the total driving time, in hours, it will take to transport all of his cattle to higher ground?
Given the limited capacity of his transport vehicle (20 head of cattle), the 400 head of cattle will require 400 / 20 = 20 trips using his transport vehicle. Traveling to the site at 60 mph for 60 miles it will take 60 / 60 = 1 hour to travel one - way. Since each trip requires driving to and returning from the relocation site, each complete round trip will take 2 * 1 = 2 hours. Thus, 20 complete trips will take 20 * 2 = 40 hours of driving time.
The answer is 40.

Answer this question:James' keyboard is missing 1/7 of the consonants and two vowels. How many keys are missing in total? (Remember there are 5 vowels and 21 consonants in the alphabet.)
First find how many consonants are missing: 21 consonants * 1 / 7 = 3 consonants. Then add the number of missing vowels to find the total number of missing keys: 3 consonants + 2 vowels = 5 keys.
The answer is 5.

Answer this question:Carla is making smoothies. If she uses 500 ml of watermelon puree and 100 ml of cream, how many 150 ml servings can she make?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
First find the total volume of the smoothie mix: 500 ml + 100 ml = 600 ml. Then divide the total volume by the volume per serving to find the number of servings: 600 ml / 150 ml / serving = 4 servings.
The answer is 4.