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andrezito [222]

2 years ago

11

An exam consists of 10 true-or-false questions. If a student guesses at every answer, what is the probability that he or she wil

l answer exactly 6 questions correctly?

1 answer:

Bond [772]2 years ago

5 0

1/2 x 1/2 x 1/2 x 1/2 x 1/2 x 1/2 = 1/64.

I think there is is 1/64 chance.

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Find the volume of the figure. Round your answer to the nearest tenth if necessary

Stella [2.4K]

The answer would be V= 192k

8 0

2 years ago

"let v = r 2 with the usual addition and scalar multiplication defined by k(u1, u2) = (ku1, 0). determine which of the five axio

expeople1 [14]

Let $\mathbf u\in\mathbb R^2$ , where

$\mathbf u=(u_1,u_2)$

and let $k\in\mathbb R$ be any real constant.

Given this definition of scalar multiplication, we can see right away that there is no identity element $e$ such that

$e\mathbf u=\mathbf u$

because

$e\mathbf u=e(u_1,u_2)=(eu_1,0)\neq(u_1,u_2)=\mathbf u$

5 0

2 years ago

Write the equation in exponential form using the two points (0,1) and (1,3)

MakcuM [25]

Answer:

$y=3^x$

Step-by-step explanation:

The equation of the function in exponential form is

$y=a\cdot b^x$

The function is determined using points (0,1) and (1,3), so their coordinates satisfy the eduation. Substitute them:

$1=a\cdot b^0\Rightarrow a=1\ \ [b^0=1]\\ \\3=a\cdot b^1\Rightarrow 1\cdot b=3,\ b=3$

Thus, the equation of the function is

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8 0

2 years ago

What is the value of x ?<br> A. 55 <br> B. 50<br> C. 160<br> D. 20

lakkis [162]

The correct option would be C

6 0

2 years ago

the average age of four men is 40. If the sum of the ages of three of them is 115, what's the age of the fourth man?

pashok25 [27]

Answer:

35

Step-by-step explanation:

if 1 man is 37

and 1 man is 43

the 3rd man is 45

they add to 115

to average 40, we gotta add 35

this old mans giving u that!

3 0

1 year ago