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crimeas [40]

2 years ago

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Mathematics

1 answer:

Zina [86]2 years ago

4 0

Answer:

i dont understand what your asking

Step-by-step explanation:

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pls help !! I need help with these few math problems !! Ily :) PLS SIMET WITH A LINK OF A PEICE OF PAPER WITH THE WORK :)

N76 [4]

Answer:

a.) 32 miles per gallon

divide by two to get one gallon

b.) She can go 32 miles on one gallon

use the info from part a

c.) 384 miles

multiply 32 by 12 to get 12 gallons

3 0

2 years ago

Read 2 more answers

If the radioactive half-life of a substance is 20 days, and there are 5 grams of it initially. When will the amount left be 2 gr

Kobotan [32]

Answer: $26.4\ \text{days}$

Step-by-step explanation:

Given

Half life of radioactive substance is $T_{\frac{1}{2}}=20\ \text{days}$

Initial amount $A_o=2\ \text{days}$

Amount left at any time is given by

$\Rightarrow A=A_o2^{\dfrac{-t}{T_{\frac{1}{2}}}}\\\\\Rightarrow 2=52^{\dfrac{-t}{20}}\\\\\Rightarrow 0.4=2^{\dfrac{-t}{20}}\\\\\Rightarrow 2^{\dfrac{t}{20}}=2.5\\\\\Rightarrow \dfrac{t}{20}\ln 2=\ln (2.5)\\\\\Rightarrow t=\dfrac{20\ln (2.5)}{\ln 2}\\\\\Rightarrow t=26.4\ \text{days}$

It takes 26.4 days to reach 2 gm.

7 0

2 years ago

An emperor penguin is 45 inches tall. It is 24 inches taller than a rockhopper penguin. Write and solve an equation to find the

Vlad [161]

H= height of rockhopper penguin.
H= 45 - 24
H= 21 inches
Answer is reasonable because you have to take the height of the emperor penguin and subtract how much taller it is from it.

7 0

2 years ago

Read 2 more answers

Find the mean and median of the data.

Mila [183]

Median=7.42

Mean=7.61

Hope this helps!

6 0

2 years ago

Read 2 more answers

Find the IQR of the data set

Phoenix [80]

Find median, in this group median is 1
find Q1 which is median of lower half, in this group Q1 = 1/4

find Q3, which is median of upper half, in this group Q3 = 5/4

IQR is Q3-Q1

IQR = 5/4 - 1/4 = 4/4 = 1

5 0

3 years ago