Toothbrushes are $4.00 each. there is a 10% discount but also 6% sales tax. What is the new price?

Multiply 4 by 10%.

10% ⇒ 0.1

4 * 0.1 = 0.4

Subtract 0.4 from 4.

4 - 0.4 = 3.6 (price with discount)

Multiply 3.6 by 6%.

6% ⇒ 0.06

3.6 * 0.06 = 0.216

Add 0.216 to 3.6.

0.216 + 3.6 = 3.816

Round 3.816 to the hundredths.

3.816 ⇒ 3.82 (price with tax)

The new price of toothbrushes is $3.82.