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jarptica [38.1K]
3 years ago
10

A ball is released from a height of 180 meters. In the first second, the ball drops 5 meters, in the second 15 meters, in the 3r

d second 25 meters, and so on. How much time will the ball take to hit the ground?
A. 4 seconds

B. 5 seconds

C. 6 seconds

D. 7 seconds
Mathematics
1 answer:
sergejj [24]3 years ago
4 0

Answer:

a. 4

Step-by-step explanation:

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A point in the figure is selected at random. Find the probability that the point will be in the part that is NOT shaded.
creativ13 [48]

Answer:

About 20%

Step-by-step explanation:

The probability of a point on the un-shaded region will be given by;

Area of the shaded region/total area

Considering that the circles are of the same size, then the length of the square is 2d

Area of the square = 4d²

Area of the shaded = (4d² -4π(d/2)²

                                = 4d² -πd², but π = 22/7

                                = 6/7d²

Probability = (6/7d² ÷ 4d²) × 100%

                  = (6/28 d²) × 100%

                  = 21.42 %

Therefore; the answer is about 20%

3 0
3 years ago
A rectangle has a side length of 2x and a diagonal of 8x. What is the missing lenght?
Leona [35]

Answer:

2x\sqrt{15}

Step-by-step explanation:

we can use the Pythagorean Theorem to find the missing side (a):

a² + (2x)² = (8x)²

a² + 4x² = 64x²

a² = 60x²

a = √60x²

a = \sqrt{4}·\sqrt{15} · \sqrt{x^2}

This can be simplified to be 2x\sqrt{15}

6 0
3 years ago
Enter a recursive rule for the geometric sequence?
Greeley [361]

Answer:

Step-by-step explanation:

a^1=-2

a^n=a×a^n-1

6 0
2 years ago
PLS HELP I WILL GIVE THE BRAINLIEST ANSWER
seropon [69]

Answer:

6

Step-by-step explanation:

If V = IR, then V = 40 * 3 in this case, which means V = 120. Quote question, "Assume voltage remains constant." This means V still equals 120 in the second scenario, which we can input into I = V / R to make I = 120 / 20 = 6.

Hope this helps!

3 0
3 years ago
Which of the following does not have 90 as a multiple?<br><br> 7<br> 6<br> 5<br> 3
Wittaler [7]

Answer:

7

Step-by-step explanation:

I don't completely understand what you were asking, but if you were counting by 7's, 91 would be after 84 instead of just 90.

8 0
2 years ago
Read 2 more answers
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