Victoria was given a $50 bill by her mother to buy her friends snacks for their group meeting. She bought 2 boxes of pizza that costs $12 each and 2 packs of juice drinks that cost $2 each. How much money should Victoria return to her mother?

Two boxes of pizza amount to $12 x 2 = $

<<12*2=24>>24. Two packs of juice amount to $2 x 2 = $<<2*2=4>>4. Victoria paid a total of $24 + $4 = $<<24+4=28>>28. Hence, she should return the $50 - $28 = $<<50-28=22>>22 to her mother. #### 22 Brenda and nine of her friends want to order a pizza. They decide that each person will eat 2 slices. If each pizza has 4 slices, how many pizzas should they order? All together, Brenda and her friends make a group of 1 + 9 = <<1+9=10>>10 people If they each want to eat 2 pizza slices, there should be 10 * 2 = <<10*2=20>>20 slices. Since a pizza has 4 slices, they will have to order 20/4 = <<20/4=5>>5 pizzas. #### 5 Maria's monthly salary is $2000. 20% of her salary goes to paying tax, and 5% goes to insurance. Also, a quarter of the money left after the deductions is spent on utility bills. How much money does Maria have after the deductions and utility bills payment? Maria's deduction for tax is 2000 x 20% = $<<2000*20*.01=400>>400. Her deduction for insurance is 2000 x 5% = $<<2000*5*.01=100>>100. Maria's total deductions is $400 + $100 = $<<400+100=500>>500. After the deductions, Maria has only $2000 - $500 = $<<2000-500=1500>>1500 left from her salary. Then, Maria pays $1500/4 = $<<1500/4=375>>375 for the utility bills. So, Maria has $1500 - $375 = $<<1500-375=1125>>1125 after the deductions and utility bills payment. #### 1125 A father is buying sand to fill his son's new sandbox, but he is worried that the sand will be too heavy for his car. The sandbox is square, with each side being 40 inches long. If a 30-pound bag of sand is enough to fill 80 square inches of the sandbox to an adequate depth, how many pounds of sand are needed to fill the box completely? The sandbox has an area of 40*40 = <<40*40=1600>>1600 square inches. To fill this area, 1600/80 = <<1600/80=20>>20 bags of sand are needed. Then, the weight of these bags is 20*30 = <<20*30=600>>600 pounds. #### 600 Bill is making omelets for his family's breakfast. It takes him 3 minutes to chop a pepper, 4 minutes to chop an onion, and 1 minute to grate enough cheese for one omelet. It takes him 5 minutes to assemble and cook the omelet. If he needs to chop up four peppers, two onions, and also grates cheese for cooking each of five omelets, how long will he spend preparing for and cooking the five omelets? First find the total time Bill spends chopping peppers: 4 peppers * 3 minutes/pepper = <<4*3=12>>12 minutes Then find the total time Bill spends chopping onions: 2 onions * 4 minutes/onion = <<2*4=8>>8 minutes Then find the combined time to grate cheese for and cook each omelet: 5+1 minute/omelet = <<5+1=6>>6 minutes Then multiply the time per omelet by the number of omelets: 5 omelets * 6 minutes/omelet = <<5*6=30>>30 minutes Then add the cook time to the chopping time to find the total time Bill spends: 30 minutes + 12 minutes + 8 minutes = <<30+12+8=50>>50 minutes #### 50 Tom decides to take 10 dance lessons that cost $10 each, but he gets two of them for free. How much does he pay? He paid for 10 - 2 = <<10-2=8>>8 lessons That means he pays 8 * $10 = $<<8*10=80>>80 #### 80 Together Felipe and Emilio needed a combined time of 7.5 years to build their homes. Felipe finished in half the time of Emilio. How many months did it take Felipe to build his house? Let F = the number of years Felipe needed to build his house Emilio = <<2=2>>2F 3F = 7.5 years F = <<2.5=2.5>>2.5 years 2.5 years = 30 months It took Felipe 30 months to build his house. #### 30 Rhett has been late on two of his monthly rent payments, but his landlord does not charge late fees and so he will be able to pay their total cost with 3/5 of his next month's salary after taxes. If he is currently paid $5000 per month and has to pay 10% tax, calculate his rent expense per month? If Rhett is currently paid $5000 per month, he pays 10/100*$5000 = $<<10/100*5000=500>>500 in taxes. Rhett has been late on two of his monthly rent payments and plans to pay them with 3/5*$4500=$<<3/5*4500=2700>>2700 from his salary after taxes. If he is to pay $2700 for two late monthly rent payments, his monthly rent expense is $2700/2=$<<2700/2=1350>>1350 #### 1350 Adam bought 15 apples on Monday. On Tuesday he bought 3 times that quantity. On Wednesday he bought 4 times the quantity he bought on Tuesday. What is the total quantity Adam bought on these three days? On Tuesday, Adam bought 3 * 15 apples = <<3*15=45>>45 apples. On Wednesday, Adam bought 4 * 45 apples = <<4*45=180>>180 apples. Adam bought 15 apples + 45 apples + 180 apples = <<15+45+180=240>>240 apples on the three days. #### 240 A mountain range has 200 active volcanoes. In a particular year, 20% of the volcanoes exploded in the first two months, 40% of the remaining exploded by the half of the year, and at the end of the year, another 50% of the volcanoes that hadn't already erupted also exploded. How many mountains are still intact at the end of the year? By the first two months, 20/100*200 = <<20/100*200=40>>40 mountains had erupted. The total number of mountains remaining after the first round of explosions is 200-40= <<200-40=160>>160 When 40% of the remaining mountains exploded, the number of mountains that were still intact decreased by 40/100*160 = <<40/100*160=64>>64 The number of mountains that hadn't exploded after the second explosions is 160-64 = <<160-64=96>>96 When 50% of the mountains which were still intact exploded, the number of mountains that hadn't erupted was reduced by 50/100*96 = <<50/100*96=48>>48 At the end of the year, 96-48 = <<96-48=48>>48 mountains remained intact and hadn't exploded. #### 48