Ariane borrows $400 on a 5−year loan. She is charged 5% simple interest per year. How much interest is she charged for 5 years? What is the total amount she has to pay back? After 5 years, Ariane is charged $ in interest. She pays a total amount of $ .

interest = $100

Amount = $500

Step-by-step explanation:

Simple interest is calculated as:

= PRT/100

where,

P = principal = $400

R = rate = 5%

T = time = 5 years

Simple interest = PRT/100

= ($400 × 5 × 5)/100

= $10,000/100

= $100

Amount paid back:

= Principal + Interest

= $400 + $100

= $500

which expression represents the approximate length of bc?

step-by-step explanation:

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.