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elena55 [62]
2 years ago
13

A door opening is 2 meters high. If there is a 39 centimeter gap between the top of Casey's head and the top of the door opening

, how tall is Casey?
Mathematics
1 answer:
sammy [17]2 years ago
8 0
You should find that Casey is 161 cm tall.
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Vitek1552 [10]

Answer:

t=1.020s

Step-by-step explanation:

Given Equation:

5t-0.5at^{2} =0

Actually the given equation is the 2nd equation of motion

i.e. S =V_{i} t+0.5at^{2}

where S=0 because the astronaut jumps on the earth

and initial velocity V_{i}=5

to find time t, put the given value of a=9.8m/s^{2} in the given equation, we get

5t-0.5(9.8)t^{2} =0\\t(5-4.9t)=0\\ \ dividing\ both\ sides\ by\ t\ we \ get\\ 5-4.9t=0\\4.9t=5\\t=\frac{5}{4.9}\\ t=1.020s

it will take t=1.020s to reach the ground if he jumps on the Earth

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3 years ago
Can you find the missing angle measurements
yarga [219]
Here is the answer for the question

6 0
3 years ago
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Can someone explain this I dont understand it
IrinaVladis [17]
Y = mx + b

m is your slope AKA rate of change
b is the y intercept.

from the graph we can see that the y intercept (b) is 15. (look at the y axis and see what point the line crosses on the y, here it is 15, in-between 10 and 20)

slope is rate of change. to figure this out remember slope = rise over run:

slope = \frac{rise}{run}

so pick two points. how much does one point rise after the other point you picked? In the graph it rises 1 square so rise = 1

Now looking at the same two points, how far away from each other are they on the x axis? Looking at the graph they are 2 squares away from each other. so run = 2

Now plug these numbers into the rise over run formula:

slope \: = \frac{1}{2}

Now we have everything we need to put into our formula for a line:

y = mx + b
y = \frac{1}{2} x + 18

For number 16 you should get:

y = \frac{1}{5} x + 3

after you do the same steps again yourself
8 0
3 years ago
Simon is selling candy bars for his class fundraiser. In each box of 56 candy bars, 18 are
Sphinxa [80]

Answer:

it will be 1.75$

Step-by-step explanation:

56-18

38x2.25

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7 0
2 years ago
a plumber charges $55 for a service call plus $35 per hour. if the plumber’s bill was $160, how many hours was he there?
Allushta [10]
He was there for 3 hours cause 3 x 35 = 105 but 105 + 55 = 160
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