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jeka57 [31]
4 years ago
6

You and your friend Sam are going to paint your 300 square feet room together.

Mathematics
1 answer:
Elza [17]4 years ago
4 0
Fraction that Sam painted in 1 min is:
10/25=2/5
Fraction that you painted in 1 min:
5/25=1/5

Fraction pained by both in 1 min:
1/5+2/5=3/5 ft²/min
Time taken to paint 50 ft² will be:
time=3/5×50=30 min
Thus we conclude that Sam was wrong.

You might be interested in
g In 2013, the Pew Research Foundation reported that 43% of U.S. adults report that they live with one or more chronic condition
SOVA2 [1]

Answer:

We are 95% confident that the true proportion of U.S. adults who live with one or more chronic conditions is between 39.7% and 46.33%

Step-by-step explanation:

From the question we are told that

  The  sample  proportion is \r p = 43\%  = 0.43

   The  standard error is SE =  0.017

Given that the confidence level is 95%  then the level of significance is mathematically represented as  

      \alpha =  (100-95)\%

=>   \alpha = 0.05

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.96

Generally the margin of error is mathematically represented as

     E = Z_{\frac{\alpha }{2} } *  SE

=>    E = 1.96 *  0.017

=>     E = 0.03332

Generally 95% confidence interval is mathematically represented as

      \r p -E <  p <  \r p +E

=>   0.43 -0.03332 <  p <  0.43 + 0.03332

=>    0.39668 <  p <  0.46332

Converting to percentage

(0.39668 * 100)<  p <  (0.46332*100)        

39.7\% <  p < 46.33 \%    

7 0
3 years ago
The math club is having a fundraiser. they are selling cards and bouquets of flowers for valentine's day. the club buys the card
Vesnalui [34]
They will have to sell about 300
4 0
4 years ago
I DO
lutik1710 [3]
A. 333.45 square inches
5 0
4 years ago
Answer for this it’s to hard for me
Ilia_Sergeevich [38]

Answer:

Option A

Step-by-step explanation:

From the graph given in the picture,

Function 1

Rate of change = Slope of the line

Slope of a line passing through two points (x_1,y_1) and (x_2,y_2) is,

Slope = \frac{y_2-y_1}{x_2-x_1}

Therefore, slope of the given line which is passing through (1, 2) and (-1, -2)will be,

Rate of change = \frac{2+2}{1+1} = 2

Function 2

Equation of the line is,

y = \frac{1}{2}x+7

By comparing this equation with slope-intercept form of the equation,

y = mx + b

Here m = rate of change Or slope of the linear function  

Rate of change of function 2 = \frac{1}{2}

Therefore, rate of change of function 1 is higher than function 2.

Option A will be the answer.

7 0
3 years ago
If 54% of all people between the ages of 35 and 50 ride a bike, find the probability for a sample of 30 people in that age group
Yuliya22 [10]

Answer:

The probability is 0.1312

Step-by-step explanation:

Here, let us set up a binomial system

From the question, 54% ride a bike

Let p = people that rides a bike

54% = 54/100 = 0.54

p = 0.54

q = 1 - p = 1 -0.54 = 0.46 ( 46% do not ride bikes)

Now, for the binomial system, we have

P(X = 15) = 30 C 15 • p^15•q^15

We have;

30 C 15 * 0.54^15 * 0.46^15

= 0.131200268998

The probability is 0.1312

8 0
3 years ago
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