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2 years ago

7

Sonji paid $25 for two scarves, which were different prices. When she got home she could not find the receipt. She remembered th

at one scarf cost $3 more than the other. What was the price of the more expensive scarf?
the answers to choose form are
a. $11
b.$12
c.$13
d.$14

1 answer:

Lyrx [107]2 years ago

6 0

Answer:

$13

Step-by-step explanation:

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A real estate agent wants to predict the selling price of single-family homes from the size of each house. A scatterplot created

kolezko [41]

Answer:

$\text{Selling price} = \$1000e^{5.6}$

The selling price of house is approximately 270.4264 thousand dollars.

Step-by-step explanation:

We are given the following in the question:

A linear model gives the relation between natural logarithm of price, in thousands of dollars, and size, in 100 square feet.

$\ln( \text{price})=2.08+0.11(\text{size})$

Let p be the price and s be the size.

$\ln(p) = 2.08 + 0.11(s)$

We have to approximate the selling price for a house with a size of 3,200 square feet.

Thus, we put s = 32

$\ln(p) = 2.08 + 0.11(32)\\\ln(p) = 5.6\\p = e^{5.6}\\p = 270.4264\\\text{Selling price} = \$1000e^{5.6}$

Thus, the selling price of house is approximately 270.4264 thousand dollars.

6 0

2 years ago

1. Let’s assume the following statements are true: Historically, 75% of the fivestar football recruits in the nation go to univ

likoan [24]

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2 years ago

A spinner with 4 congruent sectors labeled 1-4 is spun. Then a die is rolled. What is the probability of getting even numbers on

SOVA2 [1]

The spinner is divided into 4 equal sections number 1 to 4.

So, for spinner, total sections = 4
Favorable sections = 2 (i.e sections with even numbers)

So, probability of getting even number on the spinner = 2/4 = 1/2

Total number of outcome when a dice is rolled = 6
Favorable outcomes= 3 (i.e outcomes with 2,4 and 6)

So, probability of getting an even number = 3/6 = 1/2

Since both events are independent, we can write:

The probability of getting an even number in both events = 1/2 x 1/2 = 1/4

4 0

2 years ago

Use the alternative curvature formula K=|a x v|/|v|^3 to find the curvature of the following parameterized curves.

neonofarm [45]

Answer:

$K=\frac{2}{(4t^{2}+1)^{\frac{3}{2}}}$

Step-by-step explanation:

First of all, we calculate v and a as:

$v(t)=\frac{dr(t)}{dt}=(2t,1,0)$

$a(t)=\frac{dv(t)}{dt}=(2,0,0)$

after that, we compute the cross product and we replace in the formula for k

a(t) X v(t) = (0,0,2)

| a(t) X v(t) | = 2

$| v |^{3} = (4t^{2}+1)^{\frac{3}{2}}$

Hence we have

$K=\frac{2}{(4t^{2}+1)^{\frac{3}{2}}}$

I hope this is useful for you

regards

8 0

2 years ago

A jar contains 4 white and 4 black marbles. We randomly choose 4 marbles. If 2 of them are white and 2 are black, we stop. If no

Airida [17]

Answer:

<em>Find the probability of success in a single trial and then think about the nature of the problem (when do we stop). </em>

Step-by-step explanation:

Observe that in the single trial, we have (8 4) possibilities of choosing our set of balls. If we have chosen two white balls and two black balls, the probability of doing that is simply

p=(4 2)*(4 2)/(8 4)

This is well know Hyper geometric distribution. Now, define random variable X that marks the number of trials that have been needed to obtain the right combination (two white and two black balls). From the nature of the problem, observe that X has Geometric distribution with parameter p that has been calculated above. Hence

P(X = n) = (1— p)^n-1 *( p )

<em>Find the probability of success in a single trial and then think about the nature of the problem (when do we stop). </em>

3 0

2 years ago