Answer:
Shane had $240 at the beginning of his trip.
Step-by-step explanation:
Shane returned from a trip to Las Vegas with $420 and this is 75% more of at the beginning.
Let us assume the money he carried at the beginning of the trip was $x
At present he is having 75% more means total money he has = x+75% of x
This total amount is equal to $420
Therefore x + .75x = 420
x(1 +.75) =420
1.75 x = 420
Now by dividing both sides by 1.75
x = 420÷1.75
= $240
Therefore the amount he carried in the beginning of the trip is $240.
Answer:
2³ = 8
Step-by-step explanation:
According to the laws of exponents, when raising a power to another power, you need to multiply the exponents. After you multiply each set of exponents by the additional power, then it become a multiplication problem where the base is the same. When multiplying exponents with the same base, you keep the base and add the exponents:

8.235 X 10 -4exponent. The exponent is negative because you moved the decimal to the right instead of left :) hope this helps!
we are given
The water level in Ricky lake changes at an average of -7/48 inch for 1 year
It means that
In 1 year , the water level changes at 
and we have to find the water level change after 5 years
so, we can multiply both sides by 5
In 5*1 year , the water level changes at 
In 5 years , the water level changes at 
Hence,
the water level change after 5 years is
........Answer
Answer:
The standard error of the mean is 0.02
Step-by-step explanation:
Here, we want to calculate the standard error of the mean.
Mathematically;
standard error of mean = SD/ √n
where SD is the standard deviation and n is the number of samples
From the question, SD = 0.22 and n = 121
Inserting this into the equation
Standard error of the mean = 0.22/√121
= 0.22/11 = 0.02