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postnew [5]
3 years ago
5

Distance H in feet that an object falls in T seconds is modeled by the formula H equals 16 T2 squared if you drop a rock from a

cliff 1960 above the water how long will it take the rock to hit the water
Mathematics
1 answer:
Ymorist [56]3 years ago
7 0

Answer:

after 11.07secs

Step-by-step explanation:

Given the height of an object modeled by the equation

H = 16T² - 1960

The height of the object on the surface of water is zero, hence H = 0

Substitute

0 =16T² - 1960

Swap

16T² - 1960 = 0

16T² = 1960

T² = 1960/16

T² = 122.5

T = 11.07

Hence the rock will hit the surface of the water after 11.07secs

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The histogram shows informstion about how 550 peopel travel to work​
irina [24]

Answer:

1) 100 ) 15

Step-by-step explanation:

1) 30 to 50 is 20 miles so 5 * 20 is 100

2)20 to 50 is 30 miles so its 150 and 15 to 20 is 5 so 11 *5 is 55

55+150 equals 250 so the answer is 15 miles.

4 0
3 years ago
in a bag of keys there are 15 silver keys six black keys 11 copper keys and two painted keys of various colors. one key is drawn
Setler79 [48]

Answer:

The best thing to do here is to put each of these into fractions, with the total (31) as the denominator.

14/31= silver

6/31= black

8/31= copper

3/31= various colours.

As you're looking for the keys that are silver or copper, you've got to add the two denominators together, which gives you 14+8= 22.

This cannot be simplified further, therefore, the probability of choosing either a silver or copper key is 22/31.

Hope this answer helps you :)

Have a great day

Mark brainliest

7 0
3 years ago
What the answer fast
Alisiya [41]

Answer:

72

Step-by-step explanation:

36+36=72

5 0
3 years ago
Read 2 more answers
Jayden and Sheridan both tried to find the missing side of the right triangle. Jayden's Work Sheridan's Work a2 + b2 = c2 a2 + b
Svetlanka [38]

No, they are both incorrect by my understanding of your question use the Pythagorean theorem a^2 + b^2 =c^, therefore, 7^2 +x^2 = 13^2 or 49+x=169 then solve normally 169-49=120  √120 =5

The answer is 5 

5 0
3 years ago
Read 2 more answers
The measure of each interior angle of a regular polygon is 157.5 ∘ . How many sides does the polygon have?
uranmaximum [27]

180(n-2)=157.5n

180N-360=157.5n

180N-157.5n=360

22.5N=360

N=360/22.5

N=16

4 0
3 years ago
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