Tom earns $40 a week mowing lawns. He spends 1/10 of his earnings on lunch and 4/5 of his earnings on music. He saves the rest. How many dollars does Tom save?

$4

Step-by-step explanation:

Tom earns $40 a week when he now lawns.

Amount earned by Tom= $40

Fraction spent on lunch= 1/10

Fraction spent on music= 4/5

Fraction saved= 1-(1/10 + 4/5)

= 1-(1/10+8/10)

=1-(9/10)

=1/10

Amount saved = 1/10 × 40

= $4

Tom saves $4 out of the weekly amount he means by mowing lawns.

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet