Chuck breeds dogs. He has 3 pregnant dogs. They each give birth to 4 puppies. Each puppy needs 2 shots and each shot costs $5. How much did the shots cost?

He has 3*4=

<<3*4=12>>12 puppies So they need 12*2=<<12*2=24>>24 shots That means the vaccines cost 24*5=$<<24*5=120>>120 #### 120 Cortney is downloading some files to her computer. Her internet speed is 2 megabits per minute. If she can download the files one at a time and the files she is downloading have the size of 80 megabits, 90 megabits, and 70 megabits. How many hours will it take for her to download all of it? The first file will take 80/2= <<80/2=40>>40 minutes to download. The second file will take 90/2= <<90/2=45>>45 minutes to download. And the third file will take 70/2= <<70/2=35>>35 minutes to download. So, it will take 40 + 45 + 35 =<<40+45+35=120>>120 minutes for all the files to download. Therefore, the total hours she will have to spend to download all the files is 120/60= <<120/60=2>>2 hours. #### 2 Ralph watches TV for 4 hours a day from Monday to Friday, and 6 hours a day on Saturday and Sunday. How many hours does Ralph spend watching TV in one week? From Monday to Friday, Ralph watches TV for 4 * 5 = <<4*5=20>>20 hours. On Saturday and Sunday, Ralph watches TV for 2 * 6 = <<2*6=12>>12 hours. In one week, Ralph watches TV for a total of 20 + 12 = <<20+12=32>>32 hours. #### 32 Molly and her parents love to hang out at the beach on weekends. Molly spent the better part of the day at the beach and saw 100 people join them. At 5:00, 40 people left the beach. What's the total number of people at the beach if they all stayed until evening? Molly and her parent were 2+1 = <<2+1=3>>3 people. When 100 more people joined, the total number became 3+100 = <<3+100=103>>103 If 40 people left before evening, the number reduced to 103-40 = 63 people #### 63 Debby and Maggie agreed to share a sum of money so that Debby takes 25% and Maggie takes the rest. If Maggie's share is $4,500, how much did they share? If Debby's share is 25% and Maggie takes the rest, then Maggie's share is 100%-25% = 75% 75% of the total amount is Maggie's share = total amount*(75/100) = $4500 Multiplying both sides of the equation by 100/75 gives the total amount = (100/75)*$4500 = $<<100/75*4500=6000>>6000 #### 6000 If Billy sleeps 6 hours one night, then 2 more hours than that the following night, and then half the previous amount the following night, and then finally triple the previous amount the final night, how much did he sleep in that four day period? Billy slept 6 hours the first night. He then slept 6+2=<<6+2=8>>8 hours the second night. Billy then slept 8/2=<<8/2=4>>4 hours the third night. Finally, Billy slept 4*3=<<4*3=12>>12 hours the fourth night. In total, Billy slept 6+8+4+12=<<6+8+4+12=30>>30 hours. #### 30 Nancy wants to figure out if she can afford to apply to the University of Michigan. The tuition costs $22,000 per semester. Her parents can pay half the cost, and each semester Nancy can get a scholarship for $3,000 and a student loan for twice her scholarship amount. If Nancy can work a total of 200 hours during the semester, how many dollars does she have to make per hour to pay the rest of the tuition? First figure out how much Nancy has to pay after her parents pay their half by dividing the tuition by 2: $22,000 / 2 = $<<22000/2=11000>>11,000. Then figure out how much Nancy's student loan is by multiplying her scholarship amount by 2: $3,000 * 2 = $<<3000*2=6000>>6,000. Now subtract the amounts of Nancy's scholarship and loan to find out how much tuition she has to pay by working: $11,000 - $3,000 - $6,000 = $<<11000-3000-6000=2000>>2,000. Now divide the remaining unpaid tuition by the number of hours Nancy works to find out how much she needs to make per hour: $2,000 / 200 hours = $<<2000/200=10>>10/hour. #### 10 Marla is thinking about getting a canvas tote bag to avoid using plastic bags at the grocery store. If making the canvas bag released 600 pounds of carbon dioxide, each plastic bag released 4 ounces of carbon dioxide, and Marla uses eight bags per shopping trips, how many shopping trips will she have to make before the canvas bag is the lower-carbon solution? (There are 16 ounces in a pound.) First find how many ounces of carbon dioxide are released per shopping trip: 8 bags/trip * 4 oz/bag = <<8*4=32>>32 oz/trip Then divide that amount by the number of ounces per pound to find the pounds of carbon per shopping trip: 32 oz/trip / 16 oz/pound = <<32/16=2>>2 pounds/trip Then divide the amount of carbon used to make the tote bag by the amount of carbon saved per shopping trip to find the number of trips needed for the bag to be a better option: 600 pounds / 2 pounds/trip = <<600/2=300>>300 trips #### 300 Mark has 3 tanks for pregnant fish. Each tank has 4 pregnant fish and each fish gives birth to 20 young. How many young fish does he have at the end? He has 4*3=<<4*3=12>>12 pregnant fish They give birth to 12*20=<<12*20=240>>240 fish #### 240 Sarah is buying Christmas presents for her family. She starts her shopping with a certain amount of money. She buys 2 toy cars for $11 each for her sons. She buys a scarf for $10 for her mother. Then she buys a beanie for $14 for her brother. If she has $7 remaining after purchasing the beanie, how much money did she start with? Before purchasing the beanie, Sarah has $7 + $14 = $<<7+14=21>>21 Before purchasing the scarf, Sarah has $21 + $10 = $<<21+10=31>>31 The total cost of the toy cars is 2 * $11 = $<<2*11=22>>22 Before purchasing the toy cars, Sarah has $31 + $22 = $<<31+22=53>>53 #### 53