I’m being timed, correct answer will receive brainliest

HELP: I need help on multiple questions for a quiz before tomorrow night. If all is answered, you will get 40+ points and marked

Vinil7 [7]

Answer:

1. $33,000

2. $6077.53

3.

a) 2.72 seconds

b) 0.96 seconds

4. 189 square meters

5.

a) Average Rate of Change = 4 pounds per week, or -4

b) 160 pounds (after 5 weeks)

6.

Independent Variables = p, A, and H

Dependent Variable = T

141 beats per minute (rounded to nearest whole number)

Step-by-step explanation:

1.

The value of a tractor V(t) decreases over time, t. Its value is given by:

$V(t)=55000-5500t$

To find value of tractor after 4 years, we would need to substitute "4" into t and calculate. It is shown below:

$V(t)=55000-5500t\\V(4)=55000-5500(4)\\V(4) =33000$

The value of the tractor after 4 years is $33,000

2.

The value of investment that is growing each year, is given by:

$f(n)=5000(1.05)^{n}$

Where

5000 is the initial investment (deposit)

1.05 means a 5% growth rate per year

n is the time in years

We want the investment's value after 4 years, so n would be 4. Substituting we get our answer:

$f(n)=5000(1.05)^{n}\\f(4)=5000(1.05)^{4}\\f(4)=6077.53$

To the nearest cent, the value of the investment would be:

$6077.53

3,

The time it takes of pendulum to make one swing is given by the formula:

$T(L)=2\pi \sqrt{\frac{L}{32}}$

Where L is the length of the pendulum in feet

a)

If L = 6ft, the time it will take is:

$T(6)=2\pi \sqrt{\frac{6}{32}}\\T(6)=2.72$

About 2.72 seconds

b)

Now, the length is 9 inches, we convert it to feet first:

9/12 = 0.75 feet

So, the time it will take:

$T(0.75)=2\pi \sqrt{\frac{0.75}{32}}\\T(0.75)=0.96$

So, it will take about 0.96 seconds

4.

The area of weed after t days can be modeled by:

$A(t)=0.006 \pi t^2$

Where t is number of days

Now, we want to find area after 100 days, so let t = 100, we get:

$A(t)=0.006 \pi t^2\\A(100)=0.006 \pi (100)^2\\A(100)=188.5$

Rounded to nearest sq. m, we have the area to be:

189 square meters

5.

a)

The avg. rate of change is basically how much the program is advertising that someone can loose in a week. It says "4 pounds per week". Since decrease, we give the value of "4" and negative sign So:

Average Rate of Change = 4 pounds per week, or -4

b)

Initial weight is 180 pounds, we know 4 pounds is decreased every week when going through the program course. So, after 5 weeks,

5 * 4 = 20 pounds will be less

So, he will be:

180 - 20 = 160 pounds (after 5 weeks)

6.

The Karvonen formula is given as:

$T=p(220-A)+H(1-p)$

Where

T is target heart rate (in bpm)

p is the percent intensity (expressed as decimal)

A is the age (in yrs)

H is the resting heart rate (in bpm)

We need to identity the independent and dependent variables. Now, lets that a simple example:

y = 2x

Here,

x is the independent variable

y is dependent on x, so y in dependent

Similarly, if you look at the formula, you can see:

p, A, and H are all independent

T depends on them

So,

p, A, H are independent variables

T is the dependent variable

Independent Variables = p, A, and H

Dependent Variable = T

We are given

A = 35

H = 60

p = 65% = 65/100 = 0.65

Now, we want T, lets substitute and find:

$T=0.65(220-35)+60(1-0.65)\\T=141.25$

The target heart rate should be: 141 beats per minute (rounded to nearest whole number)

3 0

4 years ago

What is the union of the two sets A = {4, 8, 10, 12, 14} and B = {12, 14}?

schepotkina [342]

The union of the two sets is the combining of the two sets, so the correct answer is A. {4, 8, 10, 12, 14}.

Hope this helps =)

5 0

3 years ago

Read 2 more answers

In ΔMNO, \overline{MO}

marin [14]

Answer:

Step-by-step explanation:

Given the triangle MNO which is extended through point O to point P, we are given the followings;

Interior angles;

∠MNO=(3x+11)

∠OMN=(2x+20)

Exterior angle;

∠NOP=(8x−5)

To find x, we will use the theorem, "The sum of the interior angles is equal to the exterior"

Hence;

3x+11+2x+20 = 8x - 5

5x + 31 = 8x - 5

Collect like terms;

5x - 8x = -5-31

-3x = -36

x = -36/-3

x = 12

Hence the value of x is 12

4 0

3 years ago

Read 2 more answers

Led by vocalist Marlena McGhee Smalls, Gullah

sweet-ann [11.9K]

The correct option is (B) the Hallelujah Singers of South Carolina to help to preserve the Gullah tradition through songs and stories.

<h3>Who is a vocalist?</h3>

Another definition of a vocalist is a classically trained singer.
The emphasis in this definition of a vocalist is on technique and adherence to the composition.
A singer, on the other hand, is a vocal performer who attempts to convey the emotion of the composition through their voice.
The technique is less important.

To find the correct option:

The only correct construct here is (B) because the others imply that the tradition is only preserved through the efforts of the singers.

Therefore, the correct option is (B) the Hallelujah Singers of South Carolina to help to preserve the Gullah tradition through songs and stories.

Know more about a vocalist here:

brainly.com/question/26286861

#SPJ4

7 0

2 years ago

Change the percent to a decimal equivalent. 9 7/10

Simora [160]

Answer:

0.97

Step-by-step explanation:

97 /100

You can round once from behind to convert 97% to 0.97

6 0

4 years ago

Read 2 more answers