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kkurt [141]
3 years ago
8

Cathy is running at a rate of 9 km/h. what is her speed in m/s?

Mathematics
2 answers:
kondor19780726 [428]3 years ago
7 0
The answer is 2.4 m/s i believe
masya89 [10]3 years ago
6 0

Answer:

2.5 which is the closest rounding you will get .

Step-by-step explanation:

9 km/hr * [1 hour/ 3600] * [1000 m / 1 km]

9 * [1/3600] * [1000 /1]

9 * 1000 / 3600

9 * 0.2778

2.5 m/s

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What is -13,8,-5,3,-2,...
Minchanka [31]
What do you meen they are numbers

8 0
3 years ago
Length of a rectangle is 5 cm longer than the width. Four squares are constructed outside the rectangle such that each of the sq
TiliK225 [7]

Answer:

The perimeter of rectangle is 18\ cm

Step-by-step explanation:

Let

x-----> the length of the rectangle

y----> the width of the rectangle

we know that

x=y+5 ----> equation A

120=xy+2x^{2}+2y^{2}  ---> equation B (area of the constructed figure)

substitute the equation A in equation B

120=(y+5)y+2(y+5)^{2}+2y^{2}

120=(y+5)y+2(y+5)^{2}+2y^{2}\\ 120=y^{2}+5y+2(y^{2}+10y+25)+2y^{2}\\ 120=y^{2}+5y+2y^{2}+20y+50+2y^{2}\\120=5y^{2}+25y+50\\5y^{2}+25y-70=0

using a graphing calculator -----> solve the quadratic equation

The solution is

y=2\ cm

Find the value of x

x=y+5 ----> x=2+5=7\ cm

Find the perimeter of rectangle

P=2(x+y)=2(7+2)=18\ cm

4 0
3 years ago
Read 2 more answers
If the circumference of a circle measures 5 pie cm, what is the area of the circle in terms of pie?
saw5 [17]

Answer:

6.25π cm²

Step-by-step explanation:

pi = π

Circumference = 5πcm

Now first we should find radius(r)

2πr = 5π cm

pie will be cancelled and we get here

r = 5/ 2 cm

Therefore r = 2.5 cm

Now

Area (A) = πr²

= π * 2.5²

= 6.25π cm²

4 0
3 years ago
A cherry falls from a tree branch that is 9 feet above the ground.
miss Akunina [59]
The cinematic equation is:
 h (t) = (1/2) * a * t ^ 2 + vo * t + h0
 Where,
 a: acceleration
 vo: initial speed
 h0: initial height
 Substituting values:
 h (t) = (1/2) * (- 32) * t ^ 2 + (0) * t + 9
 h (t) = - 16t ^ 2 + 9
 For t = 0.2 we have:
 h (0.2) = - 16 * (0.2) ^ 2 + 9
 h (0.2) = 8.36 feet
 To touch the ground we have:
 -16t ^ 2 + 9 = 0
 16t ^ 2 = 9
 t = root (9/16)
 t = 0.75 s
 Answer:
 
The height of the cherry after 0.2 seconds is:
 
h (0.2) = 8.36 feet
 
the cherry hits the ground at:
 
t = 0.75 s
5 0
3 years ago
The geography of the Fertile Crescent affected the growth of Mesopotamian civilizations by:
Jlenok [28]

Answer:

The geography of the Fertile Crescent affected the growth of Mesopotamian civilizations by soil being very fertile and great for farming and planting things, the Euphrates, Tigris, and Nile rivers were also great for farming but they where also trade routes.

Step-by-step explanation:

4 0
3 years ago
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