Graham, an alien from another planet, shoots an arrow straight into the air 2.4 meters from the ground at 36 meters per second. According to the laws of physics on his planet, the
gravity is around 2.78 meters per second squared. The height of the arrow (in meters) is
represented by the equation p = -2.78t2 + 36t + 2.4, where t is the time in seconds)
after the arrow is launched.
How long does it take the arrow to hit the ground?

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

answer: the distance

step-by-step explanation:

to calculate the distance d of a line segment with endpoints (x1, y1) and (x2, y2) use the formula d (x2 x1)2 (y2 y1)2. to calculate the midpoint of a line segment with endpoints (x1, y1) and (x2, y2) use the formula

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