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3 years ago

A full truck weighed 3 2/6 tons. If the truck was only 4/6 full, how much would it weigh?

1 answer:

3 0

$\frac{4}{6}*weight\ of\ truck=\frac{4}{6}*3\frac{2}{6}=\ \ \ \ | mke\ improper\ fractions\\\\
\frac{4}{6}*\frac{20}{6}=\frac{80}{36}=2\frac{2}{9}\\\\Now\ it\ weights\ 2\frac{2}{9}\ tons.$

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Barbara found that 35 of the 60 people she surveyed had pets. About what percent of the students she surveyed had pets?

Sergio [31]

Answer:

35/60 = 0.583333333

= 0.58

0.58 * 100 = 58

58%

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3 years ago

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Assume you have such a watch. if a minimum of 18.0% of the original tritium is needed to read the dial in dark places, for how m

laila [671]

Given that the half life of 3H is 12.3 years.

The amount of substance left of a radioactive substance with half life of $t_{ \frac{1}{2} }$ after t years is given by

$N(t)=N_0\left(\frac{1}{2} \right)^{ \frac{t}{t_{\frac{1}{2}} }$

Therefore, the number of years it will take for 18% of the original tritinum to remain is given by

$18 \% = 100 \% \left(\frac{1}{2} \right)^{ \frac{t}{12.3}} \\ \\ \Rightarrow\left(\frac{1}{2} \right)^{ \frac{t}{12.3}} =0.18 \\ \\ \Rightarrow\frac{t}{12.3}\ln\left(\frac{1}{2} \right)=\ln0.18 \\ \\ \Rightarrow\frac{t}{12.3}= \frac{\ln0.18}{\ln\left(\frac{1}{2} \right)} = \frac{-1.715}{-0.6931} =2.474\\ \\ \Rightarrow t=2.474(12.3)=30.4$

Therefore, the number of <span>years that the time could be read at night is 30.4 years.</span>

5 0

3 years ago

Can someone help me with this? look at picture

nika2105 [10]

Answer:

19 (using "3.14" as pi)

18.99036781...(using pi button)

Step-by-step explanation:

Formula: C=dπ

so, (59.66)=dπ

you would divide circumference (C) by pi which will get you the answers above :)

hope this helped

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3 years ago

There is 3/4 of pizza leftover from the night before . how many 1/8 portions are there

serg [7]

We want to know how many 1/8's are in 3/4, so we divide.

$\sf\dfrac{3}{4}\div\dfrac{1}{8}$

Flip the 2nd fraction and multiply:

$\sf\dfrac{3}{4}\times\dfrac{8}{1}$

Multiply the numerators and denominators together:

$\sf\dfrac{3\times8}{4\times1}\rightarrow\dfrac{24}{4}$

Divide:

$\boxed{\sf6}$

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3 years ago

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Isidro wants to by a scooter for $89.75. The sales tax is found by multiplying the price of the scooter by 0.065. Find the total

statuscvo [17]

Answer:

Step-by-step explanation:

the scooter is 89.75

sales tax= 89.75*0.065=5.83

total cost=89.75+5.83=95.58

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3 years ago