Mathematics Middle School

ball falls so that its distance above ground can be modeled by the equation
s
=
−
16
t
2
+
100
s=−16t
2
+100 , where
s
s is the distance above the ground in feet and
t
t represents time in seconds. According to this model, how many seconds does it take for the ball to hit the ground? Round to the nearest tenth if necessary.

Answers

Answer 1

Answer:

6.25 seconds

At ground level the height of ball is 0, i.e., h=0.

Using zero product property, we get -16t -100

= -16t + 100 + 100s

= -16(t + 6.25) -16(ts + -6.25)

= 6.25s

Related Questions

Yesterday 170 guests at a hotel called for room service, and 255 guests did not call for room service. What percentage of the guests at this hotel called for room service yesterday.

Answers

Answer:

C, 40%

Step-by-step explanation:

170+255=425, 170/425=0.4%=40%

It’s 40%. 170+255=425 and I’m not sure how to explain how to convert it but once you do into a percentage you get 40%

The graph below shows the winter precipitation in Arizona from 1995 to 2002. It also shows the survival rates of Arizona pronghorn fawns for the same period.

Which two years had the most precipitation?

• Which two years had the best survival rates for fawns?

• Using your knowledge of biotic and abiotic factors and information from the graph, give two reasons why precipitation and fawn population are linked.

• Predict what would happen to the fawn population if the precipitation rate continues to go downward in 2003.

Answers

Answer:

lose people

Step-by-step explanation:

they won't get any more people coming with them

pls help this is due in an hour pls!! i will give brainliest

Although the national medal standings are not recognized by the
International Olympic Committee (IOC), these standings are usually compiled for
each Olympics. Here are the final standings for the top ten teams for the 2000 Summer Olympics in Sydney. G represents gold medals won, S represents silver
medals won, B represents bronze medals won, and T represents total medals won. Country G S B T
United States 40 24 33 97
Russia 32 28 28 88
China 28 16 15 59
Australia 16 25 17 58
Germany 13 17 26 56
France 13 14 11 38
Italy 13 8 13 34
Cuba 11 11 7 29
Great Britain 11 10 7 28
Netherlands 12 9 4 25

1. If the top ten nations were randomly selected to march, one after another, into the stadium at the closing ceremonies, in how many ways could the nations have marched in?

2. Assume that the medals won by the Netherlands were won by twenty-five different athletes. These athletes are selected to compete in a contest for charity. Their names will then be listed on a plaque with the athletes who place first, second, and third listed before the others. How many different ways are there to list the top three athletes’ names on the plaque?

3. Assume that the gold medals won by Australia were won by sixteen different athletes. Following the Olympics, a parade of the Australian Olympic participants was held in Sydney. The gold medal winners marched at the head of the column, with four of the sixteen medalists carrying the Australian flag in the front row. If the arrangement of the four gold medal winners in the front row isn’t important, how many combinations of these four athletes are there?

Answers

Answer:

1. 10 * 10 = 100

2. 6

3. 16

Step-by-step explanation:

1. 10 x 10 = 100

2. 123

321

231

213

312

132

3. 4 x 4 = 16

PLEASE HELPPP
a hot water tank was full of hot water before eddy used 15 gallons to wash clothes now there is only 80% of the water. how much water, in gallons, does the hot water tank hold?

Answers

Answer: 12 gallons are left in the hot water tank.

Why?: Take 80 percent of 15 gallons.

I RLLY NEED HELP PLEASEEEEE

Answers

Also I think the answer is 55

Answer: 5?

Step-by-step explanation: because when it leans the ladder's sizes would decrease right? so yeah I guess 5

Please help ASAP, will give BRAINLIEST

Answers

It’s like a reflection all you have to do it match them up but on the opposite side

Jake drew the sketch below of a kite that he wants to make.

Answers

Answer:

i am not sure i cannot see the whole thing

Step-by-step explanation:

Please answer this question

Answers

Answer:

volume would be 105 cubic inches

I think its the 105 or the 95 but more the 105

4. True help will be greatly appreciated, tricks or games will be reported; no links or websites or pdfs. Thanks!

Answers

Answer:

5. is 60 Miles ph

6. D

Step-by-step explanation:

5 is B, 6 is D, hope this helps

Evaluate the expression when x = 2, y = 5, and z = 4.

z2 ÷ 4

2

4

1

8

Answers

4 because when there is a letter next to a number you multiply the value of the letter by the number it is standing next to

they wont let me post this i don't know why:(

Answers

Answer:

Im choosing A and yes that would be great

Step-by-step explanation:

Corie hit 5 homeruns at batting practice out
of 20 pitches thrown. What is the
experimental probability that Corie will hit a
homerun at batting practice?
A. 1/5
B. 1/4
C. 1/3
D. 1/2

Answers

B 1/4 because he has hit 1/4 of the pitches thrown at him

B because 5 goes into 20 4 times,
but it needs to be simplified
5/20 which goes down to 1/4

PLEASE ANSWER I WILL GIVE BRAINLIEST TO WHOEVER ANSWERS GOOD PLEASE

Answers

A 6 down, A 6 right

hope this helped :)

No links please just answers thank you
Determine if the values given for the variables are solutions to the following equations.
1. x = 4 and y = 8 for y = 3x - 4
2.m = 12 and n = 200 for n = 15m - 20
3.a = 5 and b = 48 for b = 8a + 8
4.g = 40 and h = 1000 for h = 25g + 300

Answers

Answer:

1. If x = 4 and y = 8, u = 3x - 4 would make sense because 3x, or 3 x 4 = 12

12 - 4 = 8 y = 8 (True)

2. m = 12 and n = 200 . n = 15m - 20 15 x 12 = 180 180 - 20 = 200 Would not make sense because 180 - 20 is 160 (False)

3. a = 5 and b = 48 b = 48 . 8a + 8 = 8 x 5 + 8 8 x 5 + 8= 48

(True)

4. G = 40 and h = 1000

H = 25g + 300

25g = 1000

1000+300= 1300, not 1000

(false)

please help with all these questions

Answers

I can’t give you the answers, but i can give you the formulas

First question is 7.5 inches. Second question is 10 inches I think?? Unless they haven’t squared the radius, and so then it would be 100.

Plz help!!!!!!!!!!!! Will be marked BRAINLIEST

Answers

dlk

dkl

bye

0x-0= 0
0 (x-0)=0
Anything times 0 with always = 0 so I’m right

PLEASE HELP!!!! WILL GIVE BRAINLIEST!!

Answers

Answer:

sorry I cant really see with what. I recomend checking out some toturing servesices

Step-by-step explanation:

The picture is to blurry. I can’t tell the words.

Are we finding the area or circumstances?

Answers

Answer:

rate

Step-by-step explanation:

Answer:

Your finding curcumfrience

so like i need help with this

Lucas wants to use the box with the greatest volume. Which shipping box should he use?

Box __

Answers

Answer:

Box D

Step-by-step explanation:

To find volume, we multiply length x width x height.

Box A: 1 x 5 x 3= 15 ft³

Box B: 3 x 4 x 2= 24 ft³

Box C: 2 x 7 x 1= 14 ft³

Box D: 3 x 3 x 3= 27 ft³ (greatest volume)

Answer: Lucas should use box D.

Step-by-step explanation:

Volumes for each box

Box A: 15

Box B: 24

Box C: 14

Box D: 27

Hope this helped! ;)

(this is 6 grade math) PLEASE HELP

Answers

Answer
11a + 4a= 15a
3x + 6 +7x -4 = 12x
-12m -3 + 4m + 16 = 29m
6k-4+k-2 =4K
3+13-5p-2p =9p

I think these are the answers please don’t get mad if they are not hope I help :)

11a+4a=15 a
3x+6+7x-4= 10x+2
-12m-3+4m+16=-8m+13
6k-4+k-2= 7k-6
3+13-5p-2p=-7p +16

Susy made a model of a silo that had a cone on top of a cylinder. Both figures have a diameter of 4 inches. The cylinder has a height of 6 inches, and the cone has a height of 3 inches.

What is the total volume of the silo, rounded to the nearest whole number?

Use 3.14 for π.

Answers

The answer to this question is, 88.92

88.92 is the answerrrrr

PLEASE HELP I WILL GIVE BRAINLIEST TO WHOEVER ANSWERS GOOD PLEASE

Answers

Answer:

Option 3

Step-by-step explanation:

A translation is when an object "slides" from one location to another

After 24% of discount, the new price of a shoes is $75. What was the regular price of the shoes? Choose the closest number.

a. $99
b. $57
c. $18

Answers

Answer:

B $57

Step-by-step explanation:

I think i'm right I did the math

Answer:

The answer would be B - $57

Step-by-step explanation:

If you have 75 and your taking 24% off of it, you end up with $57.

Hope this helps

Brainliest??

CAN SOMEBODY PLEASE ANSWER THIS ASAP! THIS IS TIMED AND IM HAVING TROUBLE! NO LINKS

Answers

Answer:

The distance goes somewhere for little bit of time then it stays striate the rest of the time.

Step-by-step explanation:

PLS HELP, WILL REWARD BRAINLIEST !!

Answers

Answer:

A or C

Step-by-step explanation:

I think it is A or C because all of the numbers in the box and whisker plot for Brand A is higher and more closely related than Brand B's plot.

C, pretty sure it’s answer c

-3x - 5 = 16
(PLEASE HELP ME ASAP I WILL GIVE YOU BRAINLIEST AND PLEASE SHOW YOUR WORK)

Answers

Start by writing -3x-5=16. You can add 5 to both sides since the inverse operation of negative is adding positive. You will then get 16+5=21. Then you will get -3x=21. Divide by -3 on both sides. -3x/-3. 21/-3=-7 x=-7. Now check your answer -3(-7)=21-5=16. Checks out. Hopefully this helps!

Ahh I need help with this

Answers

Answer:

i thinkbit is C but im in 6th grade and at may 5 i. not there yet

the answer is C I’m in 9th

Find the surface area of a prism

Answers

Answer:

using formula

2(lw+lh+hw)

2(12*3+12*6+12*3)

2(36+72+36)

2*144

288 m^3

Step-by-step explanation:

After adding an 8-pound box with 6 identical boxes, the crate weighed 72 boxes

Answers

After adding 8 students to each of 6 same-sized teams, there were 72 students altogether.

After adding an 8-pound box of tennis rackets to a crate with 6 identical boxes of ping pong paddles, the crate weighed 72 pounds.

The first situation has all equal parts, since additions are made to each team. An equation that represents this situation is 6( x + 8 ) = 72, where x represents the original number of students on each team. Eight students were added to each group, there are 6 groups, and there are a total of 72 students.

In the second situation, there are 6 equal parts added to one other part. An equation that represents this situation is 6x + 8 = 72, where x represents the weight of a box of ping pong paddles, there are 6 boxes of ping pong paddles, there is an additional box that weighs 8 pounds, and the crate weighs 72 pounds altogether.

In the first situation, there were 6 equal groups, and 8 students added to each group. 6( x + 8 ) = 72.

In the second situation, there were 6 equal groups, but 8 more pounds in addition to that. 6x + 8 = 72.

Please help! This is due today! I just need help with this one problem!

Answers

Linear equations are 2a + 3b = 82 and a + b = 38
A = 32
B = 6

The answer: A=32
B=6

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