Can someone please help me been getting it wrong

81.64cm

Step-by-step explanation:You have to use the formula it gives you which is, C=2(pie)r. It also tells you to use 3.14 as (pie). Therefore, that brings the formula down too C=2(3.14)r. R stands for the radius of a circle which it gives you (13 cm). So now you are left with C=2*(3.14)*13. Plug in your calculator and there is your answer!

cheater

step-by-step explanation:

answer is 8x+24

area of vanessa's patio = length × width

given, length = (3x² + 5x + 10)

width = (x² - 3x - 1)

area of vanessa's patio = (3x² + 5x + 10)(x² - 3x - 1)

= 3x²(x² - 3x - 1) + 5x(x² - 3x - 1) + 10(x² - 3x - 1)

= 3x⁴ - 9x³ - 3x² + 5x³ - 15x² - 5x + 10x² - 30x - 10

= 3x⁴ - 4x³ - 8x² - 35x - 10

hence, expression of vanessa's patio = (3x⁴ - 4x³ - 8x² - 35x - 10)