All categories

3 years ago

Evaluate e^-2to one decimal place.

1 answer:

4 0

$\bf ~~~~~~~~~~~~\textit{negative exponents}\\\\
a^{-n} \implies \cfrac{1}{a^n}
\qquad \qquad
\cfrac{1}{a^n}\implies a^{-n}
\qquad \qquad 
a^n\implies \cfrac{1}{a^{-n}}\\\\
-------------------------------\\\\
e^{-2}\implies \cfrac{1}{e^2}$

plug that in your calculator, yes, your calculator has an [ e ], button for the Euler's constant.

You might be interested in

Find the area of the trapezoid to the nearest tenth.

erica [24]

Answer:

2.2 metres squared

Step-by-step explanation:

We need to find the area of this trapezoid.

The area of a trapezoid is denoted by:

$A=\frac{(b_1+b_2)h}{2}$ , where $b_1$ and $b_2$ are the parallel bases and h is the height

Here, we already know the lengths of the two bases; they are 0.9 metres and 2.3 metres. However, we need to find the length of the height.

Notice that one of the angles is marked 45 degrees. Let's draw a perpendicular line from top endpoint of the segment labelled 0.9 to the side labelled 2.3. We now have a 45-45-90 triangle with hypotenuse 2.0 metres. As one of such a triangle's properties, we can divide 2.0 by √2 to get the length of both legs:

2.0 ÷ √2 = √2 ≈ 1.414 ≈ 1.4

Thus, the height is h = 1.4 metres. Now plug all these values we know into the equation to find the area:

$A=\frac{(b_1+b_2)h}{2}$

$A=\frac{(0.9+2.3)*1.4}{2}=2.2$

The answer is thus 2.2 metres squared.

~ an aesthetics lover

8 0

3 years ago

Find the area for the following figure. O 124. 86 cm2 62.93 cm2 26.5 cm2 137.45 cm2

Semmy [17]

The answer is 62.93

8 0

3 years ago

X^2+x-12=0 solve ASAP

zzz [600]

X^2+x-12=0 factors out into (x+4)(x-3) so the answer is: x=-4, x=3

6 0

2 years ago

Which two integers is 42 between? -8 and -7 -5 and -4 -7 and -6 -9 and -8

Karo-lina-s [1.5K]

Answer:

6 and 7

Step-by-step explanation:

we know that 42 will lie between 36 and 49

And 36=6; 49=7

so we can be sure that 42 lies between 6 and 7

3 0

3 years ago

How to evaluate a piecewise function ?

8090 [49]

Answer:

So it's going to be 3 times 2 minus 8 3 times 2 is 6 6 minus 8 is negative 2 and that's the answer.

Step-by-step explanation:

5 0

3 years ago