Which of the following is the best estimate for checking the given problem
478,294,863 x 2,497,832 = 1.19 x 1015 ?

500,000,000 x 100,000,000

500,000,000 x 2,000,000

478,000,000 x 2,000,000

478,000,000 x 2,500,000

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)

you just switch the numbers basically so it would be 3/17