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Vladimir [108]
2 years ago
11

A missile is fired such that its height above the ground is given by h=-9.8t^2+38.2t+6.5, where t represents the number of secon

ds since the rocket was fired. Using the quadratic formula, determine, to the nearest tenth of a second, when the rocket will hit the ground.
Please I need help with this question
Mathematics
1 answer:
trasher [3.6K]2 years ago
7 0

Answer:

4.1 sec

Step-by-step explanation:

-9.8t^2 +38.2t + 6.5 = 0

t = \frac{-38.2 +-\sqrt{38.2^2{ - 4(-9.8)(6.5)} } }{2(9.8}

 =  \frac{-38.2 +- \sqrt{1459.24 + 254.8} }{-19.6}

 = \frac{-38.2 +- \sqrt{1714.04} }{-19.6}

 = \frac{-38.2 +- 41.4}{-19.6}

 = \frac{-79.6}{-19.6}

 = 4.1

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Aleonysh [2.5K]

Answer: you got this smarty!!!

Step-by-step explanation:

5 0
1 year ago
A company has actual unit demand for five consecutive years of 100, 105, 135, 145, and 150. The respective forecasts were 110 fo
atroni [7]

Answer:

Option A) 23

Step-by-step explanation:

We are given the following data in the question:

100, 105, 135, 145, 150

The respective forecasts were 110 for all five years.

We have to calculate MAD value.

Deviations = 10, 5, 25, 35, 40

Sum of Deviations = 10+5+25+35+40 = 115

MAD =

\dfrac{\text{Sum of absolute deviation}}{5} = \dfrac{10+5+25+35+40}{5} = \dfrac{115}{5} = 23

Thus, the correct answer is

Option A) 23

6 0
2 years ago
Write 305,000 in expanded form. i will give u brainliest
Murljashka [212]

300,000 + 5,000= 305,000

Let me know if you need anything else

4 0
2 years ago
Read 2 more answers
Y-2=6x-4 in standard form
JulijaS [17]

Answer:

6x-y=2

Step-by-step explanation:

y-2=6x-4

Since x is on the right side of the equation, switch the sides so it is on the left side of the

6x-4=y-2

Move y to the left side of the equation because it contains a variable

6x-4-y=-2

Move all terms not containing a variable to the right side of the equation

6x-y=2

8 0
2 years ago
At the bottom is a completed addition problem, with all the digits replaced by letters. Every letter represents a single digit a
Rashid [163]

Answer:

T = 5 (H = 7, M = 1); T = 7 (H = 4, M = 2); T = 9 (H = 1, M = 3)

Step-by-step explanation:

We know MH+MH+MH=TM

MH is a two digit number, and TM is also a two digit number.

MH+MH+MH=3*(MH)<100

3M<=9, meaning that M could be 1, 2, or 3.

If M=1, MH+MH+MH=3(10+H)=30+3H=TM=10*T+1

30+3H=10T+1, so 3H must include 1 in one's digit.

The only possibility is that 3H = 21, then H = 7

MH+MH+MH=17+17+17=TM=51, T = 5

If M=2, MH+MH+MH=3(20+H)=60+3H=TM=10T+2

60+3H=10T+2, so 3H must include 2 in one's digit.

The only possibility is 3H = 12, then H = 4

MH+MH+MH=24+24+24=72, T = 7

If M=3, MH+MH+MH=3(30+H)=90+3H=TM=10T+3

90+3H=10T+3, so 3H must include 3 in one's digit.

The only possibility is 3H = 3, then H =1

MH+MH+MH=31+31+31=93, T=9

4 0
2 years ago
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