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2 years ago

A penny, a nickel, a dime, and a quarter are tossed. What is the probability of obtaining at least three tails on the losses

Mathematics

1 answer:

ella [17]2 years ago

4 0

Answer:

1/8th chance

Step-by-step explanation:

two outcomes per toss, H and T, so 1/2 probability of getting tails

0.5*0.5*0.5 = 1/8th chance

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What is the margin of error for a sample statistic for a population with a standard deviation of 7.75?

3241004551 [841]

Answer:

Margin of Error = 1.96 $\times$ 7.75 = 15.19

Step-by-step explanation:

i) Margin of Error of a population with a standard deviation of 7.75?

ii) Let us assume a two tailed test with a 95% confidence interval

iii) $Z_{\frac{\alpha }{2} } = Z_{\frac{\ 0.05 }{2} } = Z_{0.025} = 1.96$

iv) therefore Margin of Error = 1.96 $\times$ 7.75 = 15.19

6 0

3 years ago

1. Homer has an idea for a new donut shop. He wants to design the donut shop so that the rectangular

Tju [1.3M]

Solving a system of equations, it is found that since the quadratic equation has two positive roots, they can be the values of the length and the width, and the design is possible.

The perimeter of a rectangle of length l and width w is given by:

$P = 2(l + w)$

The area is:

$A = lw$

In this problem, perimeter of 63.5 m, hence:

$2l + 2w = 63.5$

$2l = 63.5 - 2w$

$l = 31.75 - w$

Area of 225 m², hence:

$lw = 225$

$(31.75 - w)(w) = 225$

$w^2 - 31.75w + 225 = 0$

Which is a quadratic equation with coefficients $a = 1, b = -31.75, c = 225$ .

Then:

$\Delta = b^2 - 4ac = (-31.75)^2 - 4(1)(225) = 108.0625$

$w_1 = \frac{-b + \sqrt{\Delta}}{2a} = \frac{31.75 + \sqrt{108.0625}}{2} = 21.1$

$w_2 = \frac{-b - \sqrt{\Delta}}{2a} = \frac{31.75 - \sqrt{108.0625}}{2} = 10.68$

Since the quadratic equation has two positive roots, they can be the values of the length and the width, and the design is possible.

A similar problem is given at brainly.com/question/10489198

6 0

3 years ago

What plus 5/9 equals 1/6

pickupchik [31]

-7/18 is what you need to get 1/6 with 5/9

4 0

3 years ago

How can you use a number line to find -3+(-4) explain your answer

Vladimir [108]

Answer:

OK EASY

-3+(-4)

= 3-(-4)

=3- -4

= 3+4

= -7

6 0

3 years ago

Read 2 more answers

PLEASE HELP I'M BEGGING YOU SHOW STEPS IF YOU CAN

rusak2 [61]

You need to simplify according to distribute law

a(b+c)=ab+bc

$\\ \rm\longmapsto -2x^3(4x^3-5x^6)$

$\\ \rm\longmapsto -8x^{3+3}-10x^{6+3}$

$\\ \rm\longmapsto -8x^6-10x^9$

Highest degree=9

We need the graph (attached)

Zeros are the x intercepts

they are -7 and -1

6 0

2 years ago

Read 2 more answers