On a 8 question multiple-choice test, where each question has 3 answers, what would be the probability of getting at least one question wrong?

natalie lopez
2022-06-05

On a 8 question multiple-choice test, where each question has 3 answers, what would be the probability of getting at least one question wrong?

You can still ask an expert for help

asked 2021-01-19

In a truck-loading station at a post office, a small 0.200-kg package is released from rest a point A on a track that is one quarter of a circle with radius 1.60 m.The size of the packageis much less than 1.60m, so the package can be treated at aparticle. It slides down the track and reaches point B with a speed of 4.80 m/s. From point B, it slides on a level surface a distanceof 3.00 m to point C, where is comes to rest.

(a) What is the coefficient of kinetic friction on the horizontal surface?

(b) How much work is done on the package by friction as it slides down the circular arc from A to B?

asked 2021-01-04

Write in words how to read each of the following out loud.

a. $\{x\in {R}^{\prime}\mid 0<x<1\}$

b. $\{x\in R\mid x\le 0{\textstyle \phantom{\rule{1em}{0ex}}}\text{or}{\textstyle \phantom{\rule{1em}{0ex}}}x\Rightarrow 1\}$

c. $\{n\in Z\mid n\text{}is\text{}a\text{}factor\text{}of\text{}6\}$

d. $\{n\in Z\cdot \mid n\text{}is\text{}a\text{}factor\text{}of\text{}6\}$

asked 2020-12-28

Two blocks with masses 4.00 kg and 8.00 kg are connected by string and slide down a 30.0 degree inclined plane. The coefficient of kinetic friction between the 4.00-kg block and the plane is 0.25; that between the 8.00-kg block and the plane is 0.35.

a) Calculate the acceleration of each block

b) Calculate the tension in the string

c) What happens if the positions of the block are reversed, so that the 4.00-kg block is above the 8.00-kg block?

asked 2020-11-05

A 0.50 kg ball that is tied to the end of a 1.1 m light cord is revolved in a horizontal planewith the cord making a $30}^{\circ$ angle, with the vertical.

a) Determine the ball speed.

b) If, instead, the ball is revolved so that its speed is 4.0 m/s,what angle does the cord make with the vertical?

c) If the cord can withstand a maximum tension of 9.1 N, what is the highest speed at which the ballcan move?

asked 2021-09-17

A computer valued at $1500 loses 20% of its value each year. a. Write a function rule that models the value of the computer. b. Find the value of the computer after 3 yr. c. In how many years will the value of the computer be less than $500? Remember the general form of an exponential function: f(x)=a*b^x. Given your table and situation, determine values for a and b. Write the appropriate exponential function.

asked 2022-03-30

I have this simultaneous equation:

$\{\begin{array}{l}{x}^{2}-4x+4+{y}^{2}-2y+1=9\\ {x}^{2}-10x+25+{y}^{2}-14y+49=36\end{array}$

How do I solve it?

How do I solve it?

asked 2022-07-26

A recent advertisement for a pharmaceutical company stated that the product blackuced the risk an undesiblack outcome from 17% to 1%. The ad further claimed that this blackuction in risk represented a 94% decrease. Given what you have learned about how such calculations should be performed, is the above claim accurate (assuming the ad makers faithfully reported the actual outcome of the study)?

Choices:

Yes, the claim of a 94% blackuction in risk was accurate.

No, the claim of a 94% blackuction in risk was not accurate.

Choices:

Yes, the claim of a 94% blackuction in risk was accurate.

No, the claim of a 94% blackuction in risk was not accurate.