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3 years ago

Li cut a 6-inch piece of string into pieces that are each ½ of an inch long. How many pieces of string did she cut?

Mathematics

1 answer:

docker41 [41]3 years ago

7 0

Answer: 12

Step-by-step explanation: 6 times 2 is 12 and she has a 6 inch string and each peace is 1/2 inch long so she would have 12 peaces of string.

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The submarine is 217 feet below sea level. Identify the integer that represent the opposite of its location and its absolute val

igomit [66]

Answer:

217 ft

Step-by-step explanation:

Sea level is 0 height.

217 ft below sea level is -217 ft.

The opposite of -217 ft is 217 ft.

|-217 ft| = 217 ft

3 0

2 years ago

Small sample: During an economic downturn, companies were sampled and asked whether they were planning to increase their workfor

leva [86]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The confidence level interval is $0.016 \le C \le 0.404$

Step-by-step explanation:

The sample size is $n = 20$

The number planning to increase workforce is $x = 3$

The confidence level is $c = 98$ %

The value of proportion for a plus 4 method is

$p = \frac{x+2}{n+4}$

substituting values

$p = \frac{3+2}{20+4}$

$p =0.21$

The z-critical value at confidence level of 98% is

$z_{c}=z_{0.98} = 2.33$

This values is obtained from the standard normal table

The confidence level interval can be mathematically represented as

$C =p \ \pm z_{c} * \sqrt{\frac{p(1-p)}{n+4} }$

substituting values

$C = 0.21 \pm 2.33 * \sqrt{\frac{0.21(1- 0.21)}{20 +4} }$

$C = 0.21 \pm 0.194$

=> $0.016 \le C \le 0.404$

7 0

3 years ago

A person who is 2 m tall casts a shadow that is 5 m long. At the same time, a building casts a shadow that is

VMariaS [17]

Answer:

9.6

Step-by-step explanation:

First you figure out that the shadow is 2.5 times larger than what is casting it. Then you divide 24 by 2.5.

4 0

3 years ago

Differentiate with respect to x : 2xe^x

Gnom [1K]

$\\ \sf\longmapsto \dfrac{d}{dx}2xe^x$

Apply product rule

$\\ \sf\longmapsto \dfrac{d}{dx}2x(e^x)$

$\\ \sf\longmapsto 2x\dfrac{d}{dx}e^x+e^x\dfrac{d}{dx}2x$

$\\ \sf\longmapsto 2xe^x+2e^x$

$\\ \sf\longmapsto 2e^x(x+1)$

7 0

3 years ago

What is the value of the correlation coefficient r of the data set?

vova2212 [387]

The correlation coefficient r of the data set is <em>-0.28</em>

7 0

3 years ago