7 calculators cost $140.00

write this in rate(ratio) and the unit rate
me : )

  ratio: $140/(7 calculators)

  unit rate: $20/calculator

Step-by-step explanation:

For rates involving prices, we're usually interested in the price per item, so we divide the cost by the number of items to form the appropriate rate. Simplified, it is the unit rate.

  ratio = $140/(7 calculators) = $20/calculator = unit rate

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A "unit rate" is a rate with 1 (unit) in the denominator.

"per" can usually be considered to mean "divided by" in this context. As in "price per item" means "price divided by items".

15% chance.

step-by-step explanation:

3/10 times, the 5 year old will get a tablet. 5/10 times, the 13 yer old will get a tablet. multiply both fractions to get 15/100 times, both would have a tablet.

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.