(5.3 × 10 5)(2.1 × 10‐3) =? ANSWER PL FAS

(5.3 × 10 5)(2.1 × 10‐3) = 4770

Step-by-step explanation:

Write the problem as a mathematical expression.

(5.3×10⋅5)(2.1×10−3)

Multiply 5.3 by 10.

53⋅5(2.1⋅10−3)

Multiply 53by 5.

265(2.1⋅10−3)

Multiply 2.1 by 10.

265(21−3)

Subtract 3 from 21.

265⋅18

Multiply 265 by 18.

4770

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mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: