Help me on all of the questions below plz

Mathematics

1 answer:

Lubov Fominskaja [6]2 years ago

7 0

1- The answer is that she wants the new time to be 32 minutes

Solution: The question asks that she wants to DECREASE by 20%

What you will do it convert 20% to a decimal (which is 0.20)

Then, you need to multiply the minutes by the decimal:

40 x 0.20 = 8 minutes

Now you know that 8 minutes will be 20% of 40 minutes, so you just subtract 8 from 40 UwU

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Suppose that fund-raisers at a university call recent graduates to request donations for campus outreach programs. They report t

Flura [38]

Answer:

Following are the solution to the given points:

Step-by-step explanation:

In point a:

It's also expected that approximately $1000 \times 0.40 =400$ of both, the students contribute zero, approximately $1000 \times 0.30 =300$ to donors $10, approximately $1000 \times 0.25 = 250$ donors $25, and then about $1000 \times 0.05 = 500$ dollars $50 donors. Its frequencies would be similar to and not precisely, the probability. The four levels will stack up to a thousand.

In point b:

It is the population, in which the key value of x is a $0 donation ( 40 percent of students do this).

In point c:

$\to P(X \geq 25) \\\\\to 0.25+0.05 \\\\\to 0.30$

In point d:

$\to P(X>0)\\\\ \to 1-P(X=0)\\\\ \to 1- 0.40\\\\\to 0.60\\\\$

5 0

2 years ago

The summit of Mt. McKinley is about 20,320 feet above sea level. Earth's radius is about 3950 miles. To the nearest mile,what is

horrorfan [7]

You have to convert everything into miles and then draw the tangent line that goes from the peak of the mountain to the horizon. That can form a right triangle since tangent lines are perpendicular to the radius at the point they touch the circle. then you can solve for the horizon which is one of the legs of the right triangle. when you do everything it should end up being 174 miles. I will attach my work so you can try to decipher what to do.

I hope this helps.