An astronaut drops a rock into a crater on the moon. the distance, d(t), in meters, the rock travels after t seconds can be modeled by d(t)=0.8t^2. what is the average speed, in meters per second, of the rock between 5 and 10 seconds after it was dropped?

Step-by-step explanation:

Given equation: , d(t), in meters, the rock travels after t seconds .

At t=5

The rock travels distance=

At t=10

The rock travels distance=

Total distance traveled by rock 5 and 10 seconds after it was dropped

=80-20=60 m

Total time =10-5=5 seconds

We know that the average speed =

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

you would have to sell 24 bracelets.

step-by-step explanation:

84/3.5 = 24