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andriy [413]
3 years ago
8

Fredrick threw a ball from the top of a building. The height of the ball, in feet, after it is thrown is modeled by the function

Mathematics
1 answer:
Shalnov [3]3 years ago
6 0

Answer:

5.2seconds

Step-by-step explanation:

Fredrick threw a ball from the top of a building. The height of the ball, in feet, after it is thrown is modeled by the function

The modeled function is given as

h(t) = –16t^2 +64t + 100,

We can see this is a quadratic equation, we can solve using quadratic formula, Below

= -b±(√b^2 -4ac)/2a

Where

a=-16, b=64, c=100

FROM THE ATTACHMENT

We have too answers t= -1.20s and t=5.20s

Therefore,it take 5.20s for the ball to reach the ground (h=0). Because "t" cannot be negative here

CHECK THE ATTACHMENT FOR THE QUADRATIC SOLUTION

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Elena L [17]
D- 4 is your correct answer :)

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7 0
2 years ago
Lexi picked 2 7/10 pounds of strawberries. That afternoon, Lexi’s sister ate 7/8 of the strawberries. How many pounds of strawbe
gavmur [86]

3\frac{3}{35} pound of strawberry

Step-by-step explanation:

Given parameters:

    Pounds of strawberry picked by Lexi =2 \frac{7}{10}

    Pounds of strawberry eaten by Lexi sister = \frac{7}{8}

Unknown:

Pound of strawberry Lexi's sister ate = ?

Solution:

This is a fraction word problem.

  Let pound of strawberry eaten by Lexi's sister = K

We can establish that:

  Pound of strawberry eaten by Lexi sister x K = Pound of strawberry picked by Lexi

Mathematically we have:

         \frac{7}{8} x K = 2 \frac{7}{10}

Learn more:

fractions brainly.com/question/1757979

#learnwithBrainly

             K =  \frac{27 x 8}{10 x 7} = \frac{216}{70}

            K = 3\frac{3}{35} pound of strawberry

8 0
3 years ago
Whenever 2 line or intersect at 90 the 2 lines are said to be ?
Sedaia [141]
Two lines that intersect at 90 degrees are considered perpendicular to each other.

7 0
3 years ago
Read 2 more answers
Harsh is part of a school cricket team, and this year he has scored and average of 46 runs. He has played 5 innings so far and h
Nataly [62]

Answer: 45

Step-by-step explanation:

Harsh is part of a school cricket team, and he has scored an average of 46 runs in 5 innings. His scores in 4 of them are 46,45, 39, and 55. His fifth score is calculated as follows:

Since he made 5 innings and has an average of 46, the total scores will be:

= 46 × 5

= 230

Total of his first 4 scores will be:

= 46 + 45 + 39 + 55

= 185

5th score = 230 - 185

= 45

7 0
3 years ago
Read 2 more answers
For the following paired data, (1) Calculate the correlation coefficient, r, and (2) at the 0.05 significance level, determine w
expeople1 [14]

Answer:

Linear correlation exists

Step-by-step explanation:

Given the data :

X : | 2 4 5 6

Y : | 6 9 8 10

Using technology to fit the data and obtain the correlation Coefficient of the regression model,

The Correlation Coefficient, r is 0.886

To test if there exists a linear correlation :

Test statistic :

T = r / √(1 - r²) / (n - 2)

n = number of observations

T = 0.886 / √(1 - 0.886²) / (4 - 2)

T = 0.866 / 0.3535845

T = 2.449

Comparing Pvalue with α

If Pvalue < α ; Reject H0

Pvalue = 0.1143

α = 0.05

Pvalue > α ; We reject the null and conclude that linear correlation exists

7 0
3 years ago
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