Three old cars displayed in an auction event have different manufacture dates. The first car, made in 1970, was made 10 years earlier than the second car. The third car was manufactured 20 years later after the second car was manufactured. Calculate the year that the third car was made.

If the first car was made 10 years earlier than the second car, then the manufacture date for the second car is 1970+10 = 1980

The third car was manufactured 20 years after the second car was made, which is 1980+20 = 2000

#### 2000

Sally is saving up for a trip to Sea World. She already has $28 saved. It costs her $10 to park, $55 to get into the park and $25 for a meal pass. Sea World is 165 miles away and her car gets 30 miles per gallon of gas. If gas costs $3 a gallon, how much more will she have to save up?

She will be driving 330 miles for her trip because 2 x 165 =

<<2*165=330>>330 They will need 11 gallons of gas because 330 / 30 =<<330/30=11>>11 The gas will cost $33 because 11 x 3 = <<11*3=33>>33 Her total cost is $123 because 10 + 55 + 25 + 33 = <<10+55+25+33=123>>123 She needs to save $95 more because 123 - 28 = <<123-28=95>>95 #### 95 If 1 ounce of Dawn liquid soap can make 200,000 bubbles, and Dr. Bronner's liquid soap can make twice as many bubbles per ounce as Dawn liquid soap, then how many bubbles can be made from one half ounce of an equal mixture of Dawn and Dr. Bronner's liquid soaps? One half of a 1/2-ounce liquid is (1/2)*(1/2)=1/4 ounces. 1/4 ounce of Dawn liquid soap can make (1/4)*200,000=<<(1/4)*200000=50000>>50,000 bubbles. 1/4 ounce of Dr. Bronner's liquid soap can make 2*(1/4)*200,000=100,000 bubbles. Therefore, a half ounce of an equal mixture of Dawn and Dr. Bronner's liquid soaps can make 50,000+100,000=<<50000+100000=150000>>150,000 bubbles. #### 150,000 Georgia is sick and coughs 5 times a minute. Her brother Robert is also sick but he coughs twice as much as her. After 20 minutes, how many times have they coughed? Robert coughs twice as much as Georgia who coughs 5 times so Robert coughs 2*5 = <<10=10>>10 coughs per minute Georgia coughs 5 times and Robert coughs 10 times so together they cough 5+10 = <<5+10=15>>15 times per minute After 20 minutes they will have coughed 15*20 = <<15*20=300>>300 coughs #### 300 Tom got 40 oranges and 70 apples. If he sold 1/4 of the oranges and 1/2 of the apples. How many fruits were left in total? There are 40 + 70 = <<40+70=110>>110 oranges and apples altogether . He sold 40 x .25 = <<40*.25=10>>10 pieces of oranges. He sold 70 x .50 = <<70*.50=35>>35 pieces of apples. So, Tom was left with 110 - 10 - 35 = <<110-10-35=65>>65 pieces. #### 65 Eighteen hours ago, Beth and I took 100 photographs of our project. Today, Beth and I will take 20% fewer photographs of the same project. If we were to take 300 photographs of the project, how many photographs would we take to reach the target? If you took 100 photographs of the project 18 hours ago, and today 20% few photographs have been taken, then 20/100*100 = 20 fewer photographs of the project have been taken today. The total number of photographs of the project that have been taken today is 100-20 = <<100-20=80>>80 So far, you've taken 80+100 = <<80+100=180>>180 photographs of the project. Since the target number of photographs is 300, the number of photographs that you need to take to reach the target is 300-180 = <<300-180=120>>120 #### 120 Ali has a small flower shop. He sold 4 flowers on Monday, 8 flowers on Tuesday and on Friday, he sold double the number of flowers he sold on Monday. How many flowers does Ali sell? Combining Tuesday and Monday, Ali sold 4 + 8 = <<4+8=12>>12 flowers. On Friday, he sold 2 * 4 = <<2*4=8>>8 flowers. Altogether, Ali sold 12 + 8 = <<12+8=20>>20 flowers. #### 20 Penelope the pig eats 20 pounds of food per day, which is 10 times more than Greta the goose eats per day. Milton the mouse eats 1/100 as much as Greta the goose eats per day, but Elmer the elephant eats 4000 times more than Milton the mouse does per day. How much more, in pounds, does Elmer the elephant eat per day than Penelope the pig? Greta the goose eats 20/10=<<20/10=2>>2 pounds of food per day. Milton the mouse eats (1/100)*2=1/50 of a pound of food per day. Elmer the elephant eats 4000*(1/50)=<<4000*(1/50)=80>>80 pounds of food per day. Thus, Elmer eats 80-20=60 pounds more food per day than does Penelope the pig. #### 60 Harold had 100 marbles. He kept 20 marbles and shared the rest evenly among his 5 friends. How many marbles did each friend get? Harold shared 100 - 20 = <<100-20=80>>80 marbles with his friends. Therefore, his 5 friends got 80/5 = <<80/5=16>>16 marbles each. #### 16 John's pool is 5 feet deeper than 2 times Sarah’s pool. If John’s pool is 15 feet deep, how deep is Sarah’s pool? Let x be the number of feet in John’s pool 2*x + 5=15 2x=10 x=<<5=5>>5 #### 5