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2 years ago

“ I need help before 10:30 please help . Thank u

Mathematics

1 answer:

White raven [17]2 years ago

8 0

Answer:

The answer would be B.

Step-by-step explanation:

So what you would do is take 500 time each month that each deposit is made.

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You invest $4000 in a bank account with 5% interest compounded annually. You are wondering how long it would take for your money

torisob [31]

A = P(1 + r)^n; where A is the amount after time, n; P is the principal (the invested amount); r is the interest rate and n is the number of periods (i.e. no of years since the amount is compounded annually).

8000 = 4000(1 + 5/100)^n
8000/4000 = (1 + 0.05)^n
(1.05)^n = 2
n log 1.05 = log 2
n = log 2 / log 1.05 = 14.2067

Therefore, the amount will double in approximately 14 years.

7 0

2 years ago

Read 2 more answers

Write the equation in vertex form and then find the vertex, focus, and directrix of a parabola with equation x=y^2+18y-2

kakasveta [241]

Answer:

Part 1) The vertex is the point (-83,-9)

Part 2) The focus is the point (-82.75,-9)

Part 3) The directrix is $x=-83.25$

Step-by-step explanation:

step 1

Find the vertex

we know that

The equation of a horizontal parabola in the standard form is equal to

$(y - k)^{2}=4p(x - h)$

where

p≠ 0.

(h,k) is the vertex

(h + p, k) is the focus

x=h-p is the directrix

In this problem we have

$x=y^{2} +18y-2$

Convert to standard form

$x+2=y^{2} +18y$

$x+2+81=y^{2} +18y+81$

$x+83=(y+9)^{2}$

This is a horizontal parabola open to the right

(h,k) is the point (-83,-9)

The vertex is the point (-83,-9)

step 2

we have

$x+83=(y+9)^{2}$

<em>Find the value of p</em>

$4p=1$

$p=1/4$

<em>Find the focus</em>

(h + p, k) is the focus

substitute

(-83+1/4,-9)

The focus is the point (-82.75,-9)

step 3

Find the directrix

The directrix of a horizontal parabola is

$x=h-p$

substitute

$x=-83-1/4$

$x=-83.25$

6 0

2 years ago

A third-degree polynomial function f has real zeros -2, ½, and 3, and its

makvit [3.9K]

Answer:

$f(x)=-(x+2)(x-.5)(x-3)$

This polynomial could have infinite possibilities as any negative leading coefficient will satisfy this criteria.

3 0

3 years ago

The cost of a phone is reduced by 20%. The new cost is $70.40 . What was the original price?1. $88.002.$84.003.$58.404.$56.00

choli [55]

To get this answer you got to multiply each answer by .20% and then subtract the answer from what you divided .20% by and you should get the answer which is 88.002

4 0

3 years ago

Is the relationship shown by the data linear? If so, model the data with an equation x: -7,-5,-3,-1 y: 5,9,13,17

slava [35]

Answer:

Y = 2X + 19

Step-by-step explanation:

the relationship is linear

gradient equals 2

5 0

2 years ago