On a normal day, Julia can run a mile in 10 minutes. However, today she decided to wear her new shoes to run. They were uncomfortable and slowed her mile down to 13 minutes. How much longer would it take Julia to run 5 miles in her new shoes than if she wore her old ones?

With her regular shoes, it should take 5*10=

<<5*10=50>>50 minutes to run five miles If she wore her new shoes it would take 13*5=<<13*5=65>>65 minutes to run five miles 65-50=<<65-50=15>>15 more minutes #### 15 Meena bakes 5 dozen cookies for the school’s bake sale. She sells 2 dozen cookies to her biology teacher, Mr. Stone. Her friend Brock buys 7 cookies, and her friend Katy buys twice as many as Brock. How many cookies does Meena have left? Meena bakes a total of 5 x 12 = <<5*12=60>>60 cookies. Mr. Stone buys 2 x 12 = <<2*12=24>>24 cookies. Brock buys 7 cookies, so Katy buys 2 x 7 = <<7*2=14>>14 cookies. Meena sells a total of 24 + 7 + 14 = <<24+7+14=45>>45 cookies. She has 60 - 45 = <<60-45=15>>15 cookies left. #### 15 Monroe made 200 granola bars for her family. She and her husband ate 80, and the rest was divided equally among her children. If each child received 20 granola bars, how many children are in the family? If Monroe and her husband ate 80 granola bars, then the number of granola bars the children shared is 200-80 = 120 Each child received 20 bars, and there were 120 granola bars, meaning there were 120/20 = <<120/20=6>>6 children in the family. #### 6 Trevor buys three bouquets of carnations. The first included 9 carnations, and the second included 14 carnations. If the average number of carnations in the bouquets is 12, how many carnations were in the third bouquet? There are 3 bouquets. The total is the average times the number of bouquets, or 12*3=<<12*3=36>>36. There are 9+14=<<9+14=23>>23 accounted for. The third included 36-23=<<36-23=13>>13 carnations. #### 13 Hayden has a tank with a small hole in the bottom. The tank starts with 40 gallons of water. It loses 2 gallons of water per hour. Hayden does not add any water for the first two hours. He adds 1 gallon of water to the tank in hour three. He adds three gallons of water to the tank in the fourth hour. How much water is left in the tank at the end of the fourth hour? Over the four hours, the tank loses 2 * 4 = <<2*4=8>>8 gallons of water. Hayden adds a total of 1 + 3 = <<1+3=4>>4 gallons of water. At the end of the four hours, there is 40 - 8 + 4 = <<40-8+4=36>>36 gallons of water left in the tank. #### 36 Jerry needs to shingle 3 roofs. Each roof is made of two slanted rectangular sides measuring 20 feet by 40 feet. If he needs 8 shingles to cover one square foot of roof, how many shingles does he need total? First find the area of one side of a roof: 20 feet * 40 feet = <<20*40=800>>800 square feet Then multiply that number by 2 to find the total area of both sides of the roof: 800 square feet/side * 2 sides = 1600 square feet Then multiply that number by the number of roofs to find the total area of all the roofs: 1600 square feet/roof * 3 roofs = 4800 square feet Then multiply the total area of the roofs by the number of shingles needed per square foot to find the total number of shingles needed: 4800 square feet * 8 singles/square foot = <<4800*8=38400>>38400 shingles #### 38400 A gecko eats 70 crickets every three days. The first day she eats 30% of the crickets. The second day she eats 6 less than the first, and the third day she finishes up the remaining crickets. How many crickets does she eat on the third day? Day 1:70(.30)=21 crickets Day 2:21-6=<<21-6=15>>15 crickets Day 3:70-21-15=<<70-21-15=34>>34 crickets #### 34 Daphney buys 5 kg of potatoes at the supermarket. If 2 kg of potatoes costs $6, how much will she pay? The price per kilogram of potatoes is $6 / 2 = $<<6/2=3>>3. To buy 5 kg of potatoes, she will have to pay 5 * $3 = $<<5*3=15>>15. #### 15 Arwen and Elrond picked some flowers. Arwen was able to get 20 tulips and Elrond was able to get twice as many tulips as Arwen did. How many tulips were they able to get in total? Elrond was able to get 20 x 2 = <<20*2=40>>40 tulips. Therefore, the total number of tulips they were able to get is 40 + 20 = <<40+20=60>>60. #### 60 Ben has four boxes with ten basketball cards in each box. His mother gave him five boxes with eight baseball cards. If he gives 58 cards to his classmates, how many cards does he has left? Ben has 4 x 10 = <<4*10=40>>40 basketball cards. His mother gave him 5 x 8 = <<5*8=40>>40 baseball cards. Thus, Ben has 40 + 40 = <<40+40=80>>80 cards in all. Therefore, Ben has 80 - 58 = <<80-58=22>>22 cards left. #### 22