3 years ago

The weight of a child in 1990 was 40 lb. By 2005, the child's weight

Mathematics

1 answer:

Maslowich3 years ago

5 0

Answer:

225%

Step-by-step explanation:

1. Divide the new weight by the original weight.

90/40 = 2.25.

2. Multiply by 100 to get the percentage.

2.25 x 100 = 225%

You might be interested in

Write the standard form of the line that contains a slope of 1/2 and y-intercept of 3. Include your work in your final answer. T

nata0808 [166]

Answer:

2y-x=6

Step-by-step explanation:

Standard form is ax+by=c.

Slope form : y=mx+n where m is slope n-y intercept.

First we write in slope form

$y=\frac{1}{2}x+3$

Now we can multiply both sides by 2.

2y=x+6

Subtract for each side x

2y-x=6

4 0

3 years ago

The sample consisted of 50 night students, with a sample mean GPA of 3.02 and a standard deviation of 0.08, and 25 day students,

bulgar [2K]

Answer: The test statistic is t= -0.90.

Step-by-step explanation:

Since we have given that

n₁ = 50

n₂ = 25

$\bar{x_1}=3.02\\\\\bar{x_2}=3.04\\\\\sigma_1=0.08\\\\\sigma_2=0.06$

So, s would be

$s=\sqrt{\dfrac{n_1\sigma_1^2+n_2\sigma_2^2}{n_1+n_2-2}}\\\\s=\sqrt{\dfrac{50\times 0.08^2+25\times 0.06^2}{50+25-2}}\\\\s=0.075$

So, the value of test statistic would be

$t=\dfrac{\bar{x_1}-\bar{x_2}}{s(\dfrac{1}{n_1}+\dfrac{1}{n_2})}\\t=\dfrac{3.02-3.04}{0.074(\dfrac{1}{50}+\dfrac{1}{25})}\\\\t=\dfrac{-0.04}{0.074(0.02+0.04)}\\\\t=\dfrac{-0.04}{0.044}\\\\t=-0.90$

Hence, the test statistic is t= -0.90.

7 0

3 years ago

Solve the equation. −5 = c7

Jlenok [28]

Take the root of both sides and solve.
c = - 7 sqr root 5
c = -1.258

3 0

3 years ago

Read 2 more answers

At a hardware store, each wooden plank costs $3.57. How much do 12 planks cost? $

BigorU [14]

Answer:

42.84

Step-by-step explanation:

3.57*12=42.84

3 0

3 years ago

Each of the numbers 1 through 7 is written on a small piece of paper and placed in a box. What is the probability of picking a p

gregori [183]

Answer:

Either C or B I’m not quite sure which one. I’m sorry

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers