All categories

3 years ago

What is the only element touching the stair-step line that is not a metalloid?

Mathematics

1 answer:

maksim [4K]3 years ago

4 0

Aluminum is the only one

You might be interested in

Consider the following functions:

Nina [5.8K]

Answer:

Step-by-step explanation:

(f+g)(1) = f(1) +g(1) = -1 + 2 = 1

The pair (1, -1) in the definition of f tells you f(1) = -1.

The pair (1, 2) in the definition of g tells you g(1) = 2.

4 0

3 years ago

What is the unit rate of 144 miles on 4.5 gallons

Vinvika [58]

Miles using 4.5 gallons = 144 miles
Miles using 1 gallon
(144 miles / 4.5 gallons)
32 miles / gallon

3 0

3 years ago

Read 2 more answers

What is the answer to 35=-7=[z+8]

Ronch [10]

I believe you mean to put "()" not "[]"
I got <span>z = -8 as my answer
</span><span />

8 0

3 years ago

Write 4.63 x 10^-3 in standard notation

Ierofanga [76]

Hello!

4.63 x 10^-3 = 0,00463

8 0

2 years ago

The surface area of a given cone is 1,885.7143 square inches. What is the slang height?

kap26 [50]

Answer:

If $r >> h$ , the slang height of the cone is approximately 23.521 inches.

Step-by-step explanation:

The surface area of a cone (A) is given by this formula:

$A = \pi \cdot r^{2} + 2\pi\cdot s$

Where:

$r$ - Base radius of the cone, measured in inches.

$s$ - Slant height, measured in inches.

In addition, the slant height is calculated by means of the Pythagorean Theorem:

$s = \sqrt{r^{2}+h^{2}}$

Where $h$ is the altitude of the cone, measured in inches. If $r >> h$ , then:

$s \approx r$

And:

$A = \pi\cdot r^{2} +2\pi\cdot r$

Given that $A = 1885.7143\,in^{2}$ , the following second-order polynomial is obtained:

$\pi \cdot r^{2} + 2\pi \cdot r -1885.7143\,in^{2} = 0$

Roots can be found by the Quadratic Formula:

$r_{1,2} = \frac{-2\pi \pm \sqrt{4\pi^{2}-4\pi\cdot (-1885.7143)}}{2\pi}$

$r_{1,2} \approx -1\,in \pm 24.521\,in$

$r_{1} \approx 23.521\,in \,\wedge\,r_{2}\approx -25.521\,in$

As radius is a positive unit, the first root is the only solution that is physically reasonable. Hence, the slang height of the cone is approximately 23.521 inches.

3 0

2 years ago