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3 years ago

6

I need the full ans pls

1 answer:

aliina [53]3 years ago

7 0

Answer:

convert km per hour to meter per second by multiplying 108*5/18

speed is 30m per sec

time is 20 sec so

speed is equal to distance by time

distance is equal to speed*time

so 30*20

600 meter is the answer

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A study claims that the mean age of online dating service users is 40 years. Some researchers think this is not accurate and wan

Mademuasel [1]

Answer: $H_0:\mu=40$

$H_0:\neq40$

Step-by-step explanation:

A null hypothesis is a hypothesis where a researcher generally try to disprove, it says that there is no statistically significant relationship between the two variables .
An alternative hypothesis says that there is a statistical significance between two variables.

Claim 1. : Mean age of online dating service users is 40 years.

i.e. $\mu=40$ , since it has equals sign so we take this as null hypothesis.

Claim 2. : Mean age of online dating service users is not 40 years.

$\mu\neq40$

⇒ Null Hypothesis : $H_0:\mu=40$

Alternative hypothesis : $H_0:\neq40$

5 0

3 years ago

If a game's price went down from $60.00 to $42.00, what is the percent of the decrease?

raketka [301]

<span>$60.00 - $42.00 = </span><span>$18

</span><span>$18 / $60 = 0.30 = 30%

Answer
Decrease 30%</span>

6 0

3 years ago

Read 2 more answers

Mrs. Jones is building wooden picture frames. She has 1 5/8 of wood and needs 3/4 for each frame. How many frames can she make w

jonny [76]

Answer:

$2\frac{1}{6}\ frames$

Step-by-step explanation:

we know that

To find out how many frames she can make with the exiting material, divide 1 5/8 by 3/4

so

$1\frac{5}{8}:\frac{3}{4}$

Convert mixed number to an improper fraction

$1\frac{5}{8}=\frac{1*8+5}{8}=\frac{13}{8}$

substitute

$\frac{13}{8}:\frac{3}{4}=\frac{52}{24}\ frames$

Simplify

$\frac{13}{6}\ frames$

Convert to mixed number

$\frac{13}{6}\ frames=\frac{12}{6}+\frac{1}{6}=2\frac{1}{6}\ frames$

6 0

3 years ago

In the sale, jumpers are on the offer “buy 2, save 1

Romashka [77]

Answer:Step-by-step explanation:

so if you buy 2 jumpers it will be the cost of 1

and 30% of 50 is 15 so 15 + 15 = 30 plus 45 =

75

8 0

3 years ago

Read 2 more answers

Write the numerical expression in words two different ways. 7/ (10-3)

MissTica

Answer:

seven divided by the difference of ten and three

seven over the difference of ten and three

3 0

3 years ago