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2 years ago

Help with 6 and 7 I rlly need help

Mathematics

1 answer:

n200080 [17]2 years ago

7 0

Answer:

6) 295.2 feet squared. 7) 2, 4, 7, 8

Step-by-step explanation:

$a = 16.4 \times 18$

$a = 295.2$

$728 \div 2 = 364$

$728 \div 4 = 182$

$728 \div 7 = 104$

$728 \div 8 = 91$

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2 years ago

Simplify the following expression: 2x-2y+5z-2x-y+3z. A.x-3y+8z. B.2x-2y+8z. C.3y+8z. D.-3y+8Z Plzzzzzzzz help

Sergeu [11.5K]

Hello there ^ _ ^

2x - 2y + 5z - 2x - y + 3z
The first thing you need to do is to put all the common terms together.

2x - 2x - 2y - y + 5z + 3z
2x - 2x = 0 or nothing so we don't need to put that in the solution
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3 0

2 years ago

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Dimas [21]

Answer:

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2 years ago

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PLEASE Help! ASAP PLZ

ira [324]

Answer:

0.57 yr

Step-by-step explanation:

To find the doubling time with continuous compounding, we should look at the formula:

$FV = PVe^{rt}$

FV = future value, and

PV = present value

If FV is twice the PV, we can calculate the doubling time, t

$\begin{array}{rcl}2 & = & e^{rt}\\\ln 2 & = & rt\\t & = & \dfrac{\ln 2}{r} \\\end{array}$

1. David's doubling time

$\begin{array}{rcl}t & = & \dfrac{\ln 2}{0.06125}\\\\& = & \textbf{11.317 yr}\\\end{array}$

2. Violet's doubling time

The formula for interest compounded periodically is

$FV = PV\left (1 + \dfrac{r}{n} \right )^{nt}$

where

n = the number of payments per year

$\begin{array}{rcl}9600 & = & 4800\left (1 + \dfrac{0.065}{4} \right )^{4t}\\\\2 &= & (1 + 0.01625 )^{4t}\\& = & 1.01625^{4t}\\\ln 2& = & 4 (\ln 1.01625)\times t \\& = & 0.064478t\\t& = & \dfrac{\ln 2}{0.064478}\\\\& = & \textbf{10.750 yr}\\\end{array}$

3. David's doubling time vs Violet's

11.317 - 10.750 = 0.57 yr

It would take 0.57 yr longer for David's money to double than Violet's.

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2 years ago

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