Alarge asteroid crashed into a moon of another planet causing several boulders from the moon to be propelled into space toward the planet. astronomers were able to measure the speed of one of the projectiles. the distance (in feet) that the projectile traveled each second, starting with the first second, was given by the arithmetic progression 17,51,85, find the distance that the projectile traveled in the ninth second.

Answer. D.289 hope that helps

step-by-step explanation:

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus