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exis [7]
3 years ago
8

An arrow is shot vertically upward at a rate of 210 feet per second. Use the projectile formula h = −16t2 + v0t to determine at

what time t (in seconds) the height of the arrow will be 400 feet.
Mathematics
1 answer:
Klio2033 [76]3 years ago
7 0

Answer:

Time equal to 3.30 seconds when the arrow was going up.

Time equal to 7.94 seconds when the arrow was going down.

Step-by-step explanation:

Trust me

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Sam took 4 courses last semester: Calculus, Biology, History, and Physics. The means and standard deviations for the final exams
frutty [35]

Answer:

Calculus

Step-by-step explanation:

Calculus: z = (94-70)/12 = 2

Bio: z = (74.5-77)/10 = -0.25

History: z = (45-53)/16 = -0.5

Physics: (70.5-60)/14 = 0.75

8 0
3 years ago
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Need help with son's homework I will give 30 points!!! Please show work
Elis [28]

Answer:

A. ⇒ The expression is b + 3

B. ⇒ The expression is 2b - 4

C. ⇒ The Dr's office is closer by 4 miles

Step-by-step explanation:

A.

∵ The distance between Daniel's house and his school is b miles

∵ The swimming pool is 3 miles farther from his school

∴ The distance between Daniel's house and the swimming pool is b + 3

B.

∵ The distance from Daniel's house to his Dr's office is 4 less than twice the distance from home to Daniel's school

∵ The distance between Daniel's house and his school is b

∴ The expression of distance from Daniel's house to his Dr's office is

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C.

∵ b = 3

∴ The distance between his house and swimming pool is:

   3 + 3 = 6 miles

∴ The distance between his house and Dr's office is:

   2(3) - 4 = 2 miles

∴ The Dr's office is closer to Daniel's house than the swimming pool by:

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6 0
3 years ago
Line WY is an altitude in triangle WXZ. If ΔYWZ ~ ΔYXW, what is true about XWZ? XWZ is an obtuse angle. XWZ is a right angle. XW
topjm [15]
<span>In triangle WXZ,

Line WY is an altitude (as shown in the attached picture)
Now, it is given that:
</span><span>If ΔYWZ ~ ΔYXW
</span>∠WXY = ∠WZY
<span>
Then, we can also conclude 
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Now, in any triangle, the sum of all the three angles is 180.

In triangle, WXY, ∠WYX = 90° (From 1)
Therefore, WXY + XWY = 90°

Similarly, in WZY.

Hence, we conclude that XWZ is a right angle.

7 0
4 years ago
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According to the census data, in 2014 about 126 million adults in the United States were women, which is about 51.4% of the tota
jeka57 [31]

Answer:

245.1361868

Step-by-step explanation:

126               51.4

___    =        ____             126x100=12600      12600/51.4=245.1361868

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allochka39001 [22]

Answer:

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