The original price of the shirt is $39. It is on sale for 28% off the original price. How much
would you pay for the shirt while it is on sale?

Price after 28% off =  $28.08

Step-by-step explanation:

The original price of the shirt is $39

Price after 28% off = 39- 0.28 (39) = $28.08

$28.08

Step-by-step explanation:

$39-(28%×$39)=$39-$10.92

=$28.08

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.