All categories

2 years ago

The radius of the earth is 6,380 kilometers. what is the radius of the earth in centimeters?

Mathematics

1 answer:

fenix001 [56]2 years ago

6 0

To solve for the radius of the Earth in centimetres, we know the following information:

1 km = 1000 m

1 m = 100 cm

Therefore,

radius = 6,380 km * (1000 m / km) * (100 cm / m)

radius = 638 x 10^6 cm

You might be interested in

Kiersten runs a website that helps people learn programming. Every month, Kiersten receives a subscription fee of \$10$10dollar

bogdanovich [222]

Answer:

sorry but it is wrong the answer is 1,200

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

The graph represents the balance of Harrison’s car loan in the months since purchasing the car. A coordinate plane showing Car L

Marina CMI [18]

Answer:

Step-by-step explanation:

its the answer

5 0

2 years ago

If a boatman rows his boat 35km up stream and 55km downstream in 12 hours and he can row 30km upstream and 44 km downstream in 1

MariettaO [177]

To answer this item, we let x be the speed of the boat in still water. The speed of the current, we represent as y.

When the boat travels upstream or against the current, the speed is equal to x – y and x + y if it travels downstream or along with the current.

The time it takes for the an object to travel a certain distance is calculated by dividing the distance by the speed.

First Travel: 35 / (x – y) + 55 / (x + y) = 12

Second travel: 30 / (x – y) + 44 / (x + y) = 10

Let us multiply the two equations with the (x-y)(x+y)

This will give us,

35(x + y) + 55(x – y) = 12(x-y)(x+y)

30(x + y) + 44(x – y) = 10(x-y)(x+y)

Using dummy variables:

Let a = x + y and b be x – y

35a + 55b = 12ab

30a + 44b = 10ab

From the first equation,

b = 35a/(12a – 55)

Substituting to the second equation,

30a + 44(35a/(12a – 55)) = 10a(35a/(12a-55))

The value of a is 11.

b = 35(11)/(12(11) – 55))

b = 5

Putting back the equations,

x + y = 11

x – y = 5

Adding up the equations give us,

2x = 16

 x = 8 km/hr

The value of x, the speed of the boat in still water, is 8 km/hr.

3 0

2 years ago

Read 2 more answers

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.

ollegr [7]

Answer: a. A point estimate for p is 0.597 .

b. The 95% confidence interval for p.

Lower limit = 0.48

Upper limit = 0.71

Step-by-step explanation:

Given : Sample size of professional actors : n= 67

Number of extroverts : x= 40

Let p represent the proportion of all actors who are extroverts.

a. The point estimate for p = sample proportion = $\hat{p}=\dfrac{x}{n}$

$=\dfrac{40}{67}=0.597$

b. Confidence interval for population proportion :

$\hat{p}\pm z^*\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

Since the critical value for 95% confidence interval is 1.96 , so the 95% confidence interval for p would be

$0.597\pm (1.96)\sqrt{\dfrac{0.597(1-0.597)}{67}}$

$0.597\pm (1.96)\sqrt{0.0036}$

$0.597\pm (1.96)(0.06)$

$0.597\pm 0.1176$

$(0.597-0.1176,\ 0.597+0.1176)\\\\=(0.4794,\ 0.7146)\\\\\approx(0.48,\ 0.71)$

In the 95% confidence interval for p.

Lower limit = 0.48

Upper limit = 0.71

8 0

2 years ago

Read 2 more answers

Using the midpoint method, find the cross-price elasticity of demand for FedEx and UPS overnight shipping if the price of FedEx

IrinaK [193]

Answer:

Cross price elasticity using midpoint method = 0.56

Step-by-step explanation:

Using the mid-point method

Cross-price Elasticity of Demand = % change in Quantity demanded of UPS

% change of price of FedEx

%change in Quantity demanded of UPS

using Mid-point method = Q2-Q1 × 100

(Q1+Q2)÷ 2

= 1.3-1.2 × 100

(1.2+1.3)÷2

= 0.1 × 100

1.25

= 8%

% change in price of FedEx

using midpoint method = P2-P1 × 100

(P1+P2)÷ 2

= 75-65 × 100

(65+75)÷2

= 10 × 100

= 14.28%

Cross-price Elasticity of Demand = 8% ÷ 14.28%

using midpoint method = 0.56

6 0

2 years ago