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Karolina [17]
2 years ago
8

May i please get help i beg you​

Mathematics
1 answer:
irina [24]2 years ago
5 0

Answer:

Step-by-step explanation:

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sharon serves the volleyball to rhonda with an upward velocity of 18.5 ft/s. The ball is 4.5 feet above the ground when she stri
andreyandreev [35.5K]

we can use height formula

h(t)=-\frac{1}{2} g t^2+vt+h(0)

where

h(t) is the height after t seconds

v is velocity

h(0) is initial height

g is acceleration due to gravity

we know that

g=32 ft/s^2

we have

v=18.5ft/s

h(0)=4.5ft

so, we can plug these values

and we get

h(t)=-\frac{1}{2}*32 t^2+18.5t+4.5

h(t)=-16 t^2+18.5t+4.5

now, we have to find time when object will hit the ground

and we know that object will hit the ground when height becomes 0

so, we can set h(t)=0

and then we can solve for t

0=-16 t^2+18.5t+4.5

we can use pythagoras theorem

t=\frac{-185-\sqrt{185^2-4\left(-160\right)45}}{2\left(-160\right)}=\frac{37+\sqrt{2521}}{64}

t=1.36265sec..............Answer

7 0
2 years ago
What is the value of x ?
OLga [1]

Answer:

x = 20

Step-by-step explanation:

90 = 60 + (x + 10)

90 - 60 = x + 10

30 = x + 10

30 - 10 = x

20 = x

8 0
2 years ago
Read 2 more answers
if 40 percent of a circle is taken what would be the angle you would draw to represent 40 percent of the circle
Tema [17]
If you mean 40% of the circle with the rotation at the center of the circle, then you do this:
Measure of circle: 360°
Amount of circle's measure: 40%
360 * 40% = 144°

Thus, to take up 40% of the circle you need to have an angle measure of 144°.
6 0
3 years ago
Identify the volume of the composite figure. HELP PLEASE!!
Ilya [14]

Answer:

Vol. of the composite figure is 189 m³

Step-by-step explanation:

Find the volume of the larger figure by mult. together its 3 dimensions:

V = (9 m)(8 m)(3 m) = 216 m³.

Next, find the volume of the "notch," which is (3 m)³, or 27 m³.

Finally, subtract the "notch" volume from the 216 m³ volume found earlier:

216 m³ - 27 m³ = 189 m³

4 0
3 years ago
Evaluate the following expression 24/3+7•2-15/5+6•2
Diano4ka-milaya [45]

Answer:

31

Step-by-step explanation:

(24/3)+(7x2)-(15/5)+(6*2)

8+(7x2)-(15/5)+(6*2)

8+14-(15/5)+(6*2)

8+14-3+(6*2)

8+14-3+12

22-3+12

19+12

31


Sorry if I did my math wrong :)

6 0
3 years ago
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