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Archy [21]
3 years ago
7

Leyla drops a penny from a height of 150 m.

Mathematics
2 answers:
gizmo_the_mogwai [7]3 years ago
8 0
When the penny hits the ground, h will = 0.

So:  Set h(t) = 0 = -4.9t^2 + 0t + 150 m

Then 4.9t^2 = 150, and so t^2 = sqrt(150 / 4.9)   =    plus or minus 5.53 sec.

We can use only the positive root, as we're measuring time.

t = 5.5 sec (answer)
Sav [38]3 years ago
5 0

Wrong question...

Answer:

The answer is 3.8

Step-by-step explanation:

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PLEASE HELP!!!!!!
FinnZ [79.3K]

Answer:

110 students walk or bike to school.

Step-by-step explanation:

48% of the 208 students walk, whereas 5% bike.  Combining 48% and 5%, we get 53%.  

53% of the total number, n, comes to 208 students.

This number is 0.53(208 students), or 110 students.

110 students walk or bike to school.

4 0
3 years ago
The chemical formula for sulfuric acid is H2SO4. If the weight of the acid was 1470 grams, how much did the sulfur weigh? (H, 1;
Rom4ik [11]

Answer:

480.61g S

Step-by-step explanation:

I'm not sure what you meant in the parenthesis though. If you want the answer sig-figged it would be 481 g S. My work is attached, hope it helps!

5 0
3 years ago
Line segment AB is dilated to create line segment A'B' using point Q as the center of dilation.
Rashid [163]

Answer:

2

Step-by-step explanation:

To find the scale of dilation, you have to compare the ratio of the after transform with before transform according to the center of dilation. In this case, the center of dilation is Q so you have to compare QA' : QA. We know that QA= 1.25 and AA' is 1.25. The distance of QA' will be:

QA'= QA + AA'= 1.25 + 1.25 = 2.5

The scale factor will be:

scale factor= QA' : QA.= 2.5 : 1.25

scale factor= 2

7 0
3 years ago
Read 2 more answers
I need the answer to all of these with work shown. Thanks!!
professor190 [17]

This is for question 3a.

6 0
3 years ago
What is the slope of (1,-3) and (-5,-4)
egoroff_w [7]

Answer:

slope is 1/6

Step-by-step explanation:

3 0
3 years ago
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