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3 years ago

6

The math test has 10 multiple choice questions, each with 3 answers. If Betty guesses correctly on the first 3 questions, what i

s the probability that she will guess correctly on the fourth question?

2 answers:

Roman55 [17]3 years ago

5 0

I would say that Betty will have a probability to guess 1/3 on the fourth question due to the test only having 10 multiple choice questions with three answers.

alukav5142 [94]3 years ago

4 0

Answer: $\dfrac{1}{3}$

Step-by-step explanation:

Given: The number of multiple choices to each question = 3

We know that in multiple choice question there is only one answer is correct .

Then the probability that she will guess correctly on any question is given by :-

$=\dfrac{\text{Correct choice}}{\text{Total choices}}\\\\=\dfrac{1}{3}$

Hence, the the probability that she will guess correctly on the fourth question = $\dfrac{1}{3}$

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3 years ago

Farmer bob's square plot ofland is slowly eroding away. Worried about the future of his farm. Farmer Bob measures the rate of er

kow [346]

Answer:

Option A.

Step-by-step explanation:

Area of a square is

$A=x^2$ .... (1)

where, x is side length.

The length of each side of his square plot is decreasing at the constant rate of 2 feet/year.

$\dfrac{dx}{dt}=2$

It is given that bob currently owns 250,000 square feet of land.

Fist find the length of each side.

$A=250000$

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$x=500$

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Substitute x=500 and $\frac{dx}{dt}=2$ in the above equation.

$\dfrac{dA}{dt}=2(500)(2)$

$\dfrac{dA}{dt}=2000$

Farmer bob is losing 2,000 square feet of land per year.

Therefore, the correct option is A.

7 0

3 years ago

What is the internal angle sum of a quadrilateral? (Hint: A quadirlateral has 4 sides.) OA) 90 OB) 180 OC) 360 OD 540

shtirl [24]

The internal angle sum of a quadrilateral is :

C. 360°

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$\longmapsto (n - 2) × 180°$

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5 0

3 years ago

Read 2 more answers

What is the perimeter of a square whose diagonal is 3 square root 2? Show all work on how you got your answer

Alika [10]

Answer:

12

Step-by-step explanation:

Given: Diagonal of square= $3\sqrt{2}$

To find the perimeter of square, we need to find the length of sides of square.

∴ Using the formula of diagonal to find side of square.

Formula; $Diagonal= s\sqrt{2}$

Where, s is side of square.

⇒ $3\sqrt{2} = s\sqrt{2}$

Dividing both side by √2

⇒ $s= \frac{3\sqrt{2} }{\sqrt{2} }$

∴ $s= 3$

Hence, Length of side of square is 3.

Now, finding the perimeter of square.

Formula; $Perimeter= 4s$

⇒ $Perimeter= 4\times 3$

∴ $Perimeter= 12$

Hence, Perimeter of square is 12.

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3 years ago

If the length of a rectangle is 120 m and the diagonal measures 130 m what is the perimeter and area of the rectangle

Leviafan [203]

Answer:

Step-by-step explanation:

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perimeter=2(120+50)=2×170=340 m

area=120×50=6000 m²

5 0

3 years ago