Answer:
B
Step-by-step explanation:
The parent function represented by the graph is an exponential function, as it gets exponentially smaller.
3x(x^2+4)
3x(x^2)+3x(4)
=3x^3+12x
Cost of the skateboard = $77.99
Amount that he already has = $20
$77.99 - $20 = $57.99
He still needs <u>$57.99</u>
He earns $6 for every lawn he mows.
$57.99 ÷ 6 = 9.65
He needs to move <u>10 lawns </u>to earn that $57.99.
He can mow 3 lawns a weekend.
10 ÷ 3 = 3 1/3
He needs to work on <u>4 weekends</u> to mow the 10 lawns.
Answer: It will take him 4 weekends to save enough to buy the skateboard.
If the triangle were right-angled then the other 2 sides would be of length 30 / sqrt2 = 21.213 inches.
But it is acute angled so they will be a bit longer than this
they could be say 21.215 inches
So the required perimeter = 30 + 2*21.215 = 72.43 inches to nearest hundredth
