A newborn baby's weight is recorded each month, from the day of birth until 12 months. one baby's weights, in pounds, are recorded below: 7.20, 9.15, 11.01, 12.56, 14.04, 15.43, 16.52, 17.68, 18.77, 19.69, 20.22, 21.05, 21.90 what is the average amount of monthly weight gain, rounded to the nearest hundredth of a pound, each month? a. 1.13
b. 15.79
c. 1.23
d. 16.52

Answers

Answer 1

Answer:

Answer:

15.79

Step-by-step explanation:

To find the average amount of monthly weight gain, we need to find the average first.

Average is defined as the sum of the values (in our case value of weight in each month) and that sum divided by the number of values (in our case it is the number of months).

Finding the average:

$A=(7.20+9.15+11.01+12.56+14.04+15.43+16.52+17.68+18.77+19.69+20.22+21.05+21.90)/(13)$

Since there are 13 values so we sum up all the values and divided by the number of values.

$A=(205.22)/(13)=15.786\approx15.79$

When rounded to the nearest hundredth of a pound we get 15.79 pounds.

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One number is 4 less than 3 times a second number. If 3 more than two times the first number is decreased by two times the second, the result is 11. What are both numbers?

Answers

The 1st number is x and the 2nd number is y:

x = 3y-4
3 + 2x - 2y = 11

The first equation says that x is equal to "3y - 4", so you can plug in "3y - 4" for x in the second equation:

3 + 2(3y - 4) - 2y = 11
3 + 6y - 8 - 2y = 11
-5 + 4y = 11
4y = 16
y = 4

Now that you have y, you can plug it into the 1st equation to get x:

x = 3y - 4
x = 3(4) - 4
x = 12 - 4
x = 8

So, the 1st number is 8 and the 2nd number is 4.

The radius of the Earth is approximately 3,960 miles. Find the approximate surface-area-to-volume ratio of the Earth.

Answers

The surface area of a sphere is A = 4π R²

The volume of a sphere is V = (4/3) ( π) (R³)

The ratio of (surface area) to (volume) is

      4 π R² / (4/3) (π) (R³)

Divide top and bottom by 4π :    R² / (1/3) (R³)

Multiply top and bottom by 3: 3 R² / R³

Divide top and bottom by R² :    3 / R .

For the Earth,

   A / V = (3) / (3,960 miles) = 0.00076 per mile (rounded)

Answer:

B. 0.00076

Step-by-step explanation:

Unit test on e2020

What is 0.55 as a fraction in it's simplest form?

Answers

$0.55=(55)/(100)=(55:5)/(100:5)=(11)/(20)$

0.55 IN A FRACTION IS 55/100 =11/20 (SIMPLEST FORM)

Here is more that I need help me Please help

Answers

your questions are mixed up

ok so if you had a ppolynomial that had a leading term of a and a constant of c, then
possilbe rational roots=+/- $(factors_of_c)/(factors_of_a)$
therefor
+/-1/1 +/-3/1 +/-9/1
the bottom sign never changes therefor it was
$+/- (1*3*9)/(1)$
therefor the leading term was 1 and the contatnt was 27

to find how many sole during 8th hour, just subsitue 8 for x
g(8)=8^3-8(8^2)+10(8)+27=80+27=107 tickets
you don't need synthetic division
constant is the one that doesn't change so that isi 27

constant is 27
tickets=107

Leiff goes online to buy a new video game. He finds a site that currently has a promotion of 15% off on all orders over $50. Leiff decides to buy his video game, with a price tag of $128, at this site because he knows that he will get the 15% discount when he checks out. Leiff pays 5.3% sales tax on the discounted price and pays a shipping fee of $4.75. What is the total of Leiff’s online purchase?

Answers

If the original price tag of the video game is $128, to get its discounted price at 15%, that means what Leiff paid for was (100-15) = 85% of the original price. So, the price of the video game then becomes (0.85 x 128) = $108.80. Since Leiff has to pay an additional 5.3% of the new price, that's (100 + 5.3) = 105.3% of the new price which is (1.053 x 108.8) = $114.57 Adding the shipping fee for the videogame, 114.57 + 4.75 = $119.32 Thus, the total price is $119.32

the total price is 119

Simplify the expression below as much as possible.(7-6i) + (-1 + 4i) -(4-7i)
A. 10 + 5i
B. 2 - 9i
C. 10-9i
D. 2 +5i

Answers

The answer is D hope this helped

B. 2-9i. Is the correct answer

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