If 12 battry cost 25$ how much for 1 battery

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?

Lucy and donavan measured the length of the school garden. lucys measurement is 11.3m and donavans measurement is 113 cm. could both be correct? explain