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3 years ago

What do we use to represent a value that we don't know?

Mathematics

1 answer:

Xelga [282]3 years ago

3 0

Answer:

we use variable to represent a value that we don't know

e.g

a,b,c,x,y,etc.

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What is 713.49 written in standard form

Fantom [35]

It’s Seven Hundred Thirteen point forty-nine

6 0

3 years ago

A quantity with an initial value of 6200 decays continuously at a rate of 5.5% per month. What is the value of the quantity afte

ELEN [110]

Answer:

410.32

Step-by-step explanation:

Given that the initial quantity, Q= 6200

Decay rate, r = 5.5% per month

So, the value of quantity after 1 month, $q_1 = Q- r \times Q$

$q_1 = Q(1-r)\cdots(i)$

The value of quantity after 2 months, $q_2 = q_1- r \times q_1$

$q_2 = q_1(1-r)$

From equation (i)

$q_2=Q(1-r)(1-r) \\\\q_2=Q(1-r)^2\cdots(ii)$

The value of quantity after 3 months, $q_3 = q_2- r \times q_2$

$q_3 = q_2(1-r)$

From equation (ii)

$q_3=Q(1-r)^2(1-r)$

$q_3=Q(1-r)^3$

Similarly, the value of quantity after n months,

$q_n= Q(1- r)^n$

As 4 years = 48 months, so puttion n=48 to get the value of quantity after 4 years, we have,

$q_{48}=Q(1-r)^{48}$

Putting Q=6200 and r=5.5%=0.055, we have

$q_{48}=6200(1-0.055)^{48} \\\\q_{48}=410.32$

Hence, the value of quantity after 4 years is 410.32.

4 0

2 years ago

Read 2 more answers

ASAP PLEASE HELP ME !!!!

anygoal [31]

Answer:

90 mallards

Step-by-step explanation:

No. of ducks = 200

Mallards = 45%

45% of 200 = 45/100 × 200

=90

4 0

2 years ago

Read 2 more answers

The four rectangles shown have different side lengths.

RUDIKE [14]

Answer is D.
A and D

A = 2(6+2) = 16
D = 2(4+3) = 16
both have perimeters = 16

8 0

3 years ago

Find the area. Simplify your answer.

bija089 [108]

Step-by-step explanation:

area of rectangle=length×breadth=(2x+3)(3x+7)

=6x²+9x+14x+21=6x²+23x+21

6 0

2 years ago