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erica [24]
2 years ago
8

I i iii ii need help

Mathematics
1 answer:
san4es73 [151]2 years ago
7 0

Answer:

C or the bottom left one

Step-by-step explanation:

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If Professor Wilson found that the test scores of his students had a variance of 4.4, what is the standard deviation? Type a num
malfutka [58]

Answer:

The standard deviation will be: 2.1        

Step-by-step explanation:

We know that standard deviation is basically the square root of variance.

Using the formula to calculate the standard deviation

s=\sqrt{s^2}

As

  • The variance =  s² = 4.4

so the standard deviation can be calculated as:

standard deviation =\sqrt{s^2}

                                 =\sqrt{\left(4.4\right)^}

                                  =2.1

Therefore, the standard deviation will be: 2.1                      

8 0
3 years ago
Jamal planted 53 fewer flowers than Heidi. Write an expression to show how many flowers Heidi planted.
Sergeu [11.5K]

Answer:

y = x + 53

Step-by-step explanation:

Let x be the number of flowers Jamal planted and y the number of flowers Heidi planted.

Jamal planted 53 fewer flowers than Heidi:

x = y - 53

Isolate the y.

x + 53 = y (Change the - sign to + sign when switching from different sides of an equation)

y = x + 53

6 0
2 years ago
Read 2 more answers
Nick bought some sneakers that were 15% off the regular price of $120. If an 8% sales tax was added to the cost of the sneakers,
inn [45]
That would be $110.16
8 0
3 years ago
Read 2 more answers
Mr. Rivera is making a healthy dessert for his nephew who has diabetes. He wants
kvasek [131]

Answer:

Apple crisp has 10 grams of sugar per serving.  

Greek frozen yogurt has 5grams of sugar per serving.

The recipe with the least amount of sugar per serving is the Greek frozen yogurt.

Step-by-step explanation:

Hi, to answer this question we have to divide the amount of grams of sugar by the number of servings for each case.

Apple crisp: 80 grams ÷8 servings =80 /8 = 10 grams of sugar per serving.

Greek frozen yogurt: 60 grams ÷12 servings =60 /12 = 5 grams of sugar per serving.

So, in conclusion:

Apple crisp has 10 grams of sugar per serving.  

Greek frozen yogurt has 5grams of sugar per serving.

The recipe with the least amount of sugar per serving is the Greek frozen yogurt, because 5<10.

7 0
3 years ago
In the diagram, TC represents a vertical building. The points, A and B, are on the same level as the foot C of the building such
Alenkinab [10]

Answer:

(a) The height of the building is 60.06 m

(b) The distance AB is 139.43 m

Step-by-step explanation:

The given parameters are

Given that segment BT = segment AT + 29

By trigonometric ratios, we have;

cos∠ATC = CT/AT

cos∠BTC = CT/BT

Therefore, we have;

cos(40°) = CT/AT.................................(1)

cos(56°) = CT/BT = CT/(AT + 29).....(2)

cos(56°) = CT/(AT + 29)......................(3)

From equation (1)

CT = AT×cos(40°)

From equation (3)

AT×cos(56°) + 29 × cos(56°) = CT

Therefore;

AT×cos(40°) = AT×cos(56°) + 29 × cos(56°)

AT×cos(40°) - AT×cos(56°) =  29 × cos(56°)

AT×(cos(40°) - cos(56°)) =  29 × cos(56°)

AT = 29 × cos(56°)/(cos(40°) - cos(56°)) = 78.4 m

TC = CT = AT×cos(40°) = 78.4×cos(40°) = 60.06 m

The height of the building = 60.06 m

(b) BT = AT + 29 = 78.4 m + 29 m= 107.4 m

AB = AT×sin(∠ATC ) + BT×sin(∠BTC) = 78.4×sin(40°) + 107.4×sin(56°) =  139.43 m

The distance AB =  139.43 m.

6 0
3 years ago
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