Answer:
5
Step-by-step explanation:
2x^2+2x-40=0
2x^2+10x-8x-40=0
2x(x+5)-8(x+5)=0
(2x-8)(x+5)=0
2(x-4)(x+5)=0
x=-5 and 4
If you graph it, the zeros are just the values of x when the curve meets the x axis...
This forms a right angled triangle and Ralph flies down the hypotenuse x,
so using trigonometry:-
sin 59 = 12.4 / x
x = 12.4 / sin 59
= 14.47 feet to nearest hundredth.
Answer:
1385 mi to find the area A=21(21)(3.14)
A=441(3.14)
1384.74 round to the nearest 10th is 1385
