when i was 2 years old my sister was half in my age now i am 100 years old then how old is my sister?

Answers

Answer 1

Answer: When I was 2 years old, my sister was 1/2 my age ==> she was 1 ==> she will
always be 1 year younger than I am, and she will never be able to catch up to me.

Now I am 100, so my sister must be 99 .

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Divide 7/15 by 3/5. A. 75/21B. 7/9C. 7/25D. 21/75
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Put brackets in the expression to make this correct 3*2+5*8=88

The Museum of Science in Boston has an exhibit in which metal balls drop down a chute, bounce around, and wind up in one of 21 bins. After 1000 balls have dropped, the heights within the bins clearly follow a bell-shaped curve. If the standard deviation is 3 bins, approximately how many balls are in bins 1 through 7?A) 100
B) 160
C) 50
C) 330

Answers

if you have 21 bins then the 'middle bin' is bin 11 (starting at 1)So the 'mean' of this distribution is 11.The SD is 3so using the above calculator (or your own tables ) you get that the probability of a ball being in bin 7 or less is .091

A is you answer

A.100 so make sure you put your answer

(3 pt) Which shows the dimensions of two rectangular prisms that have volumes of 320 mm3 but different surface areas? A. 16 mm by 5 mm by 4 mm; 5 mm by 4 mm by 16 mm B. 10 mm by 4 mm by 6 mm; 6 mm by 10 mm by 4 mm C. 8 mm by 10 mm by 4 mm; 10 mm by 8 mm by 4 mm D. 8 mm by 10 mm by 4 mm; 20 mm by 8 mm by 2 mm

Answers

D. 8 mm by 10 mm by 4 mm
20 mm by 8 mm by 2 mm

8 x 10 x 4 = 320 mm
20 x 8 x 2 = 320 mm

Joe has 16 more baseball cards than football cards. He also noticed that of the total he has three times as many baseball cards as football cards. How many football cards does he have?

Answers

Football cards: x
Baseball cards: x + 16
He also noticed that of the total he has three times as many baseball cards as football cards. So, the baseball cards: 3x

x + 16 = 3x
x = 8 (football cards)

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