A(t)=400e^-0.032(t)after 3, 8 and 10 yrs

Mathematics

2 answers:

salantis [7]3 years ago

6 0

10 years is correct answer.

<h2>hope it helps you have a great day keep smiling be happy stay safe ☺️</h2>

tatyana61 [14]3 years ago

3 0

Answer:

10 yrs

Step-by-step explanation:

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laila [671]

$f(x)=a\cdot b^x\\\\\text{a-the initial amount}\\\\\text{b-growth factor}$

$\text{We have:}\ f(x)=620\cdot7.8^x\\\\\text{a=620; b=7.8}$

$\boxed{Answer:\ B.\ 620,\ 7.8}$

4 0

4 years ago

Jessica used 2/3 yard of fabric to make a scarf. Can she make 2 of these scarves with 1 3/4 yards of fabric, and why?

Alex Ar [27]

Option 1

Jessica can make 2 scarves

yes, because the quotient of $1 \frac{3}{4} \div \frac{2}{3} \text { is } 2 \frac{5}{8}$

<u>Solution:</u>

Given, Jessica used $\frac{2}{3}$ yard of fabric to make a scarf.

We have to find can she make 2 of these scarves with $1\frac{3}{4}$ yards of fabric, and why?

Now, let us find number of scarves that can be made from available scarf

$\text { Number of scarves }=\frac{\text { avaiable scarf }}{\text { fabric required for } 1 \text { scarf }}$

$\begin{array}{l}{=\frac{1 \frac{3}{4}}{\frac{2}{3}}=1 \frac{3}{4} \times \frac{3}{2}} \\\\ {=\frac{4 \times 1+3}{4} \times \frac{3}{2}} \\\\ {=\frac{16+5}{8}=2 \frac{5}{8}}\end{array}$