To celebrate the first day of school, Tanvi brought in a tray of caramel brownies and walnut brownies. She brought 45 caramel brownies and 15 walnut brownies. What percentage of the brownies were caramel? Write your answer using a percent sign (%).

45%?

Step-by-step explanation:

38.25

Step-by-step explanation:                                                                                                       To subtract 15 percent from 45 just divide the percentage (15) by 100, subtract this value from 1, then multiply it by the initial value (45), so:

Final Value = 45 × (1 - 15/100)

Final Value = 45 × (1 - 0.15)

Final Value = 45 × (0.85)

Final Value = 38.25

Subtract 15% is the same as discount 15%. this operation could be, for example, a 15% discount on 45.

Note: 0.15 can be found just by moving the decimal point 2 places to the the left 15/100 = 0.15 as a decimal.

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

300pi

step-by-step explanation: