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djyliett [7]
3 years ago
9

EASY POINTS + BRAINLIEST PLZ HELP!!!!

Mathematics
1 answer:
Mademuasel [1]3 years ago
5 0

Answer:

t = 2.61

Step-by-step explanation:

h (t) = (1/2) x (- 9.8) x t ^ 2 + 12 x t + 2

h (t) = -4.9 x t ^ 2 + 12 x t + 2 (rewritten)

When the ball hits the ground:  

-4.9 x  t ^ 2 + 12 x t + 2 = 0

Solved:

t1 = -0.16

t2 = 2.61

The negative is irrelevant here. Hence: 2.61.

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erin buys a bag of peanuts that weighs 3/4 of a pound.  Later that week, the bag is 2/3 full.  how much does the bag of peanuts
Anna71 [15]
In math, "of" usually means "times".

2/3 x 3/4  =  6/12  =  <em>1/2 pound</em>.
8 0
3 years ago
I need help on this..... can anyone help me?
galben [10]

Answer and step-by-step explanation:

Tim Carter money made:

First 40 hours = 40 * pay per hour = 40 * 5.15 = $206 (weekly pay)

Because he works for 50 hours so next 10 hours (50-40) = 10 * (1.5*5.15)

= 10* 7.725 = $77.25

Total money he made:

= 206 + 77.25 = $283.25

Jeese Jones money amde:

First 40 hours = 40 * pay per hour = 40 * 5.15 = $206 (weekly pay)

Because he works for 47.5 hours so next 7.5 hours (47.5-40) = 7.5 * (1.5*5.15)

= 7.5 *7.725 = $57.9375

Total money Jeese Jones made:

= 206 + 57.9375 = $263.9375

Barbara Burns money made:

First 40 hours = 40 * pay per hour = 40 * 5.15 = $206 (weekly pay)

Because Barbara Burns works for 44 hours so next 4 hours (44-40) = 4 * (1.5*5.15)

= 4* 7.725 = $30.9

Total money Barbara Burns made:

= 206 + 30.9 = $236.9

Hope this help you :3

6 0
3 years ago
What is the value of n?
Julli [10]

Answer:

A

Step-by-step explanation:

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

n is an exterior angle of the triangle.

The 2 opposite interior angles are

180° - 131° = 49° and 180° - 160° = 20°, thus

n = 49° + 20° = 69° → A

7 0
4 years ago
Read 2 more answers
Heights of fourth graders are Normally distributed with a mean of 52 inches and a standard deviation of 3.5 inches. What percent
SVEN [57.7K]

Answer:

C. 59.01%

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 52, \sigma = 3.5

What percentage of fourth graders are between 50 inches and 56 inches?

This is the pvalue of Z when X = 56 subtracted by the pvalue of Z when X = 50.

X = 56

Z = \frac{X - \mu}{\sigma}

Z = \frac{56 - 52}{3.5}

Z = 1.14

Z = 1.14 has a pvalue of 0.8729

X = 50

Z = \frac{X - \mu}{\sigma}

Z = \frac{50 - 52}{3.5}

Z = -0.57

Z = -0.57 has a pvalue of 0.2843.

0.8729 - 0.2843 = 0.5886, which is close to 59.01%.

So the correct answer is:

C. 59.01%

7 0
3 years ago
A model is made it an Airbus A300 aeroplane. The length of the model is 36cm. The length of the real aeroplane is 54cm. Find the
Irina18 [472]

Answer: 1 : 150

Step-by-step explanation:

The length of the model is 36cm. The length of the real aeroplane is 54 cm. This length seems implausible as it is of the real plane so I will assume that you meant to type 54m.

First convert 54 m to centimetres:

1 m = 100cm

= 54 * 100

= 5,400 cm

Length of model : length of plane

36 : 5,400

Divide both sides by 36:

= 1 : 150

8 0
3 years ago
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