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3 years ago

A rock is dropped from a height of 88.6 m and falls toward Earth in a straight line. In t seconds the rock falls 4.9t2 meters.

Mathematics

1 answer:

Allushta [10]3 years ago

8 0

Answer:

The average speed is 9.8 meter per second in the first two seconds

Step-by-step explanation:

Complete Question

What is the average velocity of the rock in first 2 secs?

Solution

Distance travelled in first two seconds

$4.9 t^2 = 4.9*2*2 = 19.6$ m

Average speed = $S2-S1/2 = 19.6-0/2 = 9.8$ meter per second

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A triangular bookself has a base of 10 inches,12 inches and 18 inches. Will the bookself fit in the corner of a square living ro

melisa1 [442]

Answer:

No, if fit means that the sides of the book case need to be flush with the wall, which means that the sides of the bookcase are touching the wall and the bookcase fits perfectly in that spot

Step-by-step explanation:

A square room will have corners that meause 90°, so we need to see if any of the vertices of the bookcase measure 90°. All right triangles have a 90° in them, so we can use Pythagorean Theorem to solve this.

Pythagorean Theorem is a² + b² = c², where a and b are the legs, and c is the hypotenuse. Since the hypotenuse is always the longest side, for our bookshelf, 10 and 12 are the legs, and 18 would be the hypotenuse if it is a right triangle. Plug the values in to see if the equation is true or false

10² + 12² = 18²

100 + 144 = 324

244 ≠ 324 so the bookcase does not form a right angle, and won't fit in the corner of the room

4 0

3 years ago

47 In 2012 there were approximately 8,950 public libraries in the United States. A survey found

Ipatiy [6.2K]

Answer:

6802

Step-by-step explanation:

Number of liberaries = 8950

76% offered free acces to ebooks.

How many offered access to ebook = 76% / 100% x 8950

= 0.76 x 8950

= 6802

4 0

3 years ago

10 beads fit on a bracelet. Ben has 34 beads in all. How many bracelets can he make with 10 beads on each

Lady_Fox [76]

Answer:

3 with a remainder of 4 beads

Step-by-step explanation:

if you want to put 10 beads on each bracelet but you only have 34 beads you are going to do subtraction (this is division but subtraction is the easiest way to explain it) so you have 34 bead and that’s more than 10 so you can make a bracelet so subtract 10 from 34, so now you have 24 beads and one bracelet, now 24 is greater than 10 so subtract again, 24-10 which is 14 so now you have 14 beads and 2 bracelets and 14 is greater than 10 so we can make another, 14-10 is 4 so now you have 4 beads and 3 bracelets now 4 is less than 10 so you can’t make another (hope this helps)

8 0

3 years ago

Please help! ASAP

vaieri [72.5K]

891 were sold
.55x1800= 990
10% of 990 roses is 99 (99 is left over)
990-99= 891

5 0

3 years ago

A triangular pyramid with a height of 9 inches has a volume of 63 cubic inches. If the height of the triangular base is 6 inches

Bond [772]

Option D: 21 in is the base length of the triangular base.

Explanation:

Given that a triangular pyramid with a height of 9 inches has a volume of 63 cubic inches.