Joey studies for his SAT exams 2 hours per night 5 nights a week. On the weekends, he studies 3 hours a day. If his SAT exam is 6 weeks away, how much time will Joey spend studying?

How many hours does Joey study each week? ** Joey studies 2 hours a night 5 nights a week so that's 2*5 =

<<2*5=10>>10 hours How many hours does Joey study on the weekends? ** He studies 3 hours a day on the weekends so that's 3*2 = <<3*2=6>>6 hours How many hours does Joey study in one week? ** In one week, Joey studies 10+6 = <<10+6=16>>16 hours How many hours will Joey spend studying? ** He has 6 weeks till his exams and he studies for 16 hours a week so that's 6*16 = <<6*16=96>>96 hours of studying #### 96 On a 16 GB (gigabyte) capacity USB drive, 50% is already busy. Calculate the number of gigabytes still available. How many gigabytes are already busy? ** We calculate 50% of 16 GB: How many gigabytes are already busy? ** 50/100 * 16 GB = 0.5 * 16 GB = <<50/100*16=8>>8 GB How many gigabytes are still available? ** That leaves 16 GB - 8 GB = <<16-8=8>>8 GB available on this key. #### 8 Marla is planning the lunch menu for an elementary school. There are 5 third grade classes with 30 students each, 4 fourth grade classes with 28 students each, and 4 fifth grade classes with 27 students each. Each student gets a hamburger, which costs $2.10, some carrots, which cost $0.50, and a cookie, which cost $0.20. How much does one lunch for all the students cost? How many students are in third grade? ** First find the total number of students in third grade 5 classes * 30 students/class = <<5*30=150>>150 students How many students are in fourth grade? ** Then find the total number of students in fourth grade 4 classes * 28 students/class = <<4*28=112>>112 students How many students are in fifth grade? ** Then find the total number of student in fifth grade 4 classes * 27 students/class = <<4*27=108>>108 students How many students are there? ** Now add the number of students in each grade to find the total number of students 150 students + 112 students + 108 students = <<150+112+108=370>>370 students How much does one lunch cost? ** Now find the total cost of one lunch $2.10 + $0.50 + $0.20 = $<<2.10+0.50+0.20=2.80>>2.80 How much does one lunch for all the students cost? ** Now multiply that cost by the number of students to find the total cost for the school $2.80/student * 370 students = $<<2.80*370=1036>>1036 #### 1036 Two white socks cost 25 cents more than a single brown sock. If two white socks cost 45 cents, how much would you pay for 15 brown socks? How much does a brown sock cost? ** Two white socks cost 25 cents more than a single brown sock, meaning a brown sock is sold at $0.45-$0.25=$0.20 How much would you pay for 15 brown socks? ** The cost of buying 15 brown socks is 15*$0.20=$<<15*0.20=3>>3 #### 3 Kim buys 3 pizzas. They are 12 slices each. The pizza cost $72. How much did 5 slices cost? How many slices did Kim get? ** he got 3*12=<<3*12=36>>36 slices How much did each slice cost? ** So each slice cost 72/36=$<<72/36=2>>2 How much did 5 slices cost? ** So 5 slices would cost 5*2=$<<5*2=10>>10 #### 10 Lily had $55 in her account. She spent $7 on a shirt. She then went to another shop and spent thrice as much as she spent on a shirt. How much money is left in Lily's account? How much money did Lily have after spending money on a shirt? ** After spending money on a shirt, Lily had $55 - $7 = $<<55-7=48>>48 left. How much money did Lily spend on another store? ** She spent $7 x 3 = $<<7*3=21>>21 on another store. How much money is left in Lily's account? ** Therefore, she only has $48 - $21 = $<<48-21=27>>27 left on her account. #### 27 Georgie needs 3 avocados to make her grandmother's guacamole recipe. If she already had 5 avocados and her sister buys another 4 avocados, how many servings of guacamole can Georgie make? How many avocados does Georgie have? ** Altogether, Georgie has 5 + 4 = <<5+4=9>>9 avocados. How many servings of guacamole can Georgie make? ** She can make 9/3 = <<9/3=3>>3 servings of guacamole. #### 3 Sabrina gave 10 cookies to her brother. Her mother gave Sabrina half the number of cookies she gave her brother. Then Sabrina gave two-thirds of her cookies to her sister. If Sabrina had 20 cookies at the start, how many cookies are left with her? How many cookies did Sabrina have left after giving 10 cookies to her brother? ** Sabrina had 20 - 10 = <<20-10=10>>10 cookies left after giving 10 cookies to her brother. How many cookies did Sabrina's mother give her? ** Sabrina's mother gave her 10/2 = <<10/2=5>>5 cookies. How many cookies did Sabrina have then? ** So, she had 10 + 5 = <<10+5=15>>15 cookies then. How many cookies did Sabrina give to her sister? ** She gave 15 x 2/3 = <<15*2/3=10>>10 cookies to her sister. How many cookies are left with her? ** Therefore, she only has 15 - 10 = <<15-10=5>>5 cookies left. #### 5 Isabel has some money in her piggy bank. She spent half the amount and bought a toy. She then spent half of the remaining money and bought her brother a book. If she has $51 left, how much money, in dollars, did she have at first? How much money was left after Isabel bought the toy? ** After buying the toy, Isabel has 51*2=<<51*2=102>>102 dollars left. How much money did she have at first? ** Isabel had 102*2=<<102*2=204>>204 dollars at first. #### 204 A pool has 48 blue tiles and 32 red tiles. If the pool needs 100 tiles to be completed, how many more tiles are needed? How many tiles does the pool currently have? ** The pool currently has 48+32 = <<48+32=80>>80 tiles. How many more tiles are needed? ** The pool needs 100-80 = <<100-80=20>>20 more tiles to be completed. #### 20