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2 years ago

Survey 1: A township employee surveys all 118 workers at a shopping mall to learn about the salaries of the workers.

Mathematics

1 answer:

azamat2 years ago

4 0

Answer:

Step-by-step explanation: survey 1:3

survey 2:2

survey 3:1

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A. For what values of k does the function y = cos(kt) satisfy the differential equation 25y'' = −16y?

Oduvanchick [21]

Answer:

Step-by-step explanation:

Given y = coskt

y' = -ksinkt

y'' = -k²coskt

Substitute this y'' into the expression 25y'' = −16y

25(-k²coskt) = -16(coskt)

25k²coskt = 16(coskt)

25k² = 16

k² = 16/25

k = ±√16/25

k = ±4/5

b) from the DE 25y'' = −16y

Rearrange

25y''+16y = 0

Expressing using auxiliary equation

25m² + 16 = 0

25m² = -16

m² = -16/25

m = ±4/5 I

m = 0+4/5 I

Since the auxiliary root is complex number

The solution to the DE will be expressed as;

y = Asinmt + Bsinmt

Since k = m

y = Asinkt+Bsinkt where A and B are constants

6 0

3 years ago

What is the following product 3 sqrt 4 sqrt 3

Yanka [14]

$\bf 3\sqrt{4}\cdot \sqrt{3}\implies 3\sqrt{2^2}\cdot \sqrt{3}\implies 6\sqrt{3}$

7 0

2 years ago

Read 2 more answers

A builder is installing a fence on all four sides of a backyard. The yard is 40 feet long and 50 feet wide. How much fencing wil

Brums [2.3K]

50•2=100
Then 40•2=80
Than add 100+80=
180! Please Thank me!

5 0

2 years ago

Read 2 more answers

What is log base3 a/3

Sophie [7]

Answer:im not really sure but i think log3(3) Logarithm base 3 of 3 is 1 .

Step-by-step explanation:

3 0

2 years ago

Evaluate this expression <br> (-7--9)*(8+2)

Marizza181 [45]

Before we get started, it is good to remember PEMDAS - the acronym that tells you the order to carry out equations.

P = parentheses
E = exponents
M = multiplication
D = division
A = addition
S = subtraction

Knowing this, we should start by doing the equations <em>within </em>each parentheses.

$(-7 - -9) *(8 + 2)$
$(2) *(10)$

So we did the addition and subtraction pieces within each group leaving us with the above equation. Now let's multiply:

$(2)*(10) = 20$

20 is the answer.

5 0

2 years ago