Which number is an integers <br> -3/4<br> 1/5<br> 2<br> 42/3

Please dont steal points only real answers

morpeh [17]

1. 4 1/5
2. 11/24
3. 12 1/4
4. 2
5. 3 5/12

I did the math but I’m sorry if it’s not all correct

8 0

3 years ago

The school band is having a car wash to raise money. There goal is to collect $150. So far they have earned $10 each from three

Lady bird [3.3K]

They’ve already earned $105 so they need $45 more to reach their goal

4 0

3 years ago

Among all pairs of numbers with a sum of 215, find the pair whose product is maximum. Write your answers as fractions reduced to

valentina_108 [34]

Answer:

Step-by-step explanation:

This is calculus, but I don't get fractions in the end. To maximize or minimize any function, you need to find the derivative of it, set it equal to 0, then solve for the critical values.

Our given equation is

x + y = 215 and we want to maximize the product, xy. Therefore,

y = 215 - x so its product in terms of x is

x(215-x) which is

$215x -x^2$ . The derivative of this is

215 - 2x. Set it equal to 0 to maximize it.

215 - 2x = 0 so

-2x = -215 and

x = 107.5.

Sub this in to solve for y:

y + 107.5 = 215 and

y = 107.5

The product is 11556.25, not that you need it.

6 0

3 years ago

What is the cube root of y and the power of 2 = 4\9

ipn [44]

Y^2=4/9
y=sqrt(4/9)
y=2/3

8 0

3 years ago

For a statistics class project, a college student randomly samples 75 men who exercise at a gym regularly and 68 women who exerc

raketka [301]

Answer:

iii. The data do not provide sufficient evidence to conclude that the mean number of minutes exercised per week is larger for men than for women at this gym

Step-by-step explanation:

1) The hypotheses are

H0: u1 ≤ u2 against the claim Ha: u1 > u2

The men spend less or equal time than the women at the gym each week

vs

the men spend greater time than the women at the gym each week

2) The test statistic is

t= (x1`- x2`) / √ s1²/n1+ s2²/n2

t= 65.7- 64.8/√(13.9)²/75 + (9.6)²/68

t= 0.9/√2.57613 +1.35529

t=0.4539

and the degrees of freedom is

3) υ = [s₁²/n1 + s₂²/n2]²/ (s₁²/n1 )²/ n1-1 + (s₂²/n2)²/n2-1

=[(13.9)²/75 + (9.6)²/68]²/ [(13.9)²/75 ]² /74 + [ (9.6)²/68]²/67

= 139

The degrees of freedom is always rounded in this calculation

4) The Critical region is [1.656, ∞]

5) t-score is outside of the critical region, so there is not enough evidence to reject H₀.

iii. The data do not provide sufficient evidence to conclude that the mean number of minutes exercised per week is larger for men than for women at this gym

4 0

3 years ago

Which number is an integers -3/4 1/5 2 42/3