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olganol [36]
3 years ago
13

Without further study, you forget things as time passes. A model of human memory gives the percentage, p, of acquired knowledge

that a person retains after t weeks. The formula is p = (100 – a)e-bt + a, where a and b vary from one person to another. If a = 18 and b = 0.6 for a certain student, how much information will the student retain two weeks after learning it?
Mathematics
1 answer:
PIT_PIT [208]3 years ago
5 0

Answer:

42.69% of information is acquired by the student in two weeks.

Step-by-step explanation:

We are given the following in the question:

p = (100 -a)e^{-bt} + a

where a and b are constants.

a = 18\\b = 0.6

p tells us about the percentage of acquired knowledge that a person retains after t weeks.

We have to find the percentage of knowledge acquired in two week.

We put t = 2

p = (100 -18)e^{-(0.6)(2)} + 18\\p = 42.69

Thus, 42.69% of information is acquired by the student in two weeks.

You might be interested in
the perimeter of a rectangle is 58cm. the length is 7cm less than three times the width. find the length and width. (translate t
Pie

Answer:

length = 20 cm

width = 9 cm

Step-by-step explanation:

perimeter =  58 cm

58cm = 2*L+2*w equation 1

L = 3w -7 equation 2

where:

L= length

w=width

so we have:

58 = 2(3w -7) +2w

58 = 6w -14 +2w

58 +14 = 8w

72 = 8w

w = 72/8

w = 9 cm = width

we have:

L = 3(9) -7 = 20 cm = length

4 0
3 years ago
What is the slope of your line perpendicular to y=5x-12
krok68 [10]

The slope of your line is the x-coefficient: 5.

The slope of a perpendicular line is the negative reciprocal of that: -1/5.

4 0
3 years ago
Read 2 more answers
What is the scientific notation for 3734940000
malfutka [58]
3.73494 x 10^9

I hope this helps you out Heyimnessa.
3 0
3 years ago
I need help.........................
Darina [25.2K]

Answer:

y is located at (1,1)

the measure is 56

c - congruent

Step-by-step explanation:

If its rotated at its vortex then its rotating around the coordinates of Y

If the angle is rotated then the value of the angle does not change

7 0
3 years ago
Am I correct? ( top question)
EastWind [94]

Answer:

72

Step-by-step explanation:

<1 and <2 are not equal to each other

Let the angle  directly above angle 2 (on the right side of the line) be angle 3

<1 and <3 are corresponding angle, which means they are equal

<2 and <3 are supplementary angles since the form a line

<2 + <3 = 180

We know <1 = <3

<1 + <3 = 180

We are given <1 = 2x+12  and <2 = 3x+18

2x+12 + 3x+18 = 180

Combine like terms

5x+30 = 180

Subtract 30 from each side

5x+30-30 = 180-30

5x= 150

Divide each side by 5

5x/5 = 150/5

x=30

<1 = 2x+12

Substitute 30 in for x to find angle 1

   = 2*30 +12

   =60+12

  = 72

6 0
3 years ago
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