All categories

3 years ago

What is the value of log2 128?

2 answers:

6 0

If you get confused by logarithms, here's an easier way to think about this problem: What power of 2 equals 128? Well, we know 2^3 = 8, then 2^4 must equal 16. Doubling every times, we get 2^5 = 32, 2^6 = 64 and 2^7 = 128. So, the value of log₂128 is 7.

Ede4ka [16]3 years ago

6 0

The answer would be 7......

You might be interested in

The slope-intercept form of the equation of a line is _____________, where m is the _____________ and the y-intercept if (___,__

kotegsom [21]

Y=mx+b

slope

(0,b)

The slope-intercept form of the equation of a line is y=mx+b, where m is the slope and the y-intercept if (0,b) 

why are you asking these easy questions? I thought your math level was way out.

6 0

3 years ago

Read 2 more answers

The surface area of a melting snowball decreases at a rate of3.8cm2/min. Find the rate at which its diameter decreases when the

Scorpion4ik [409]

Answer:

Step-by-step explanation:

This is a pretty basic related rates problem. I'm going to go through this just like I do in class when I'm teaching it to my students.

We see we have a snowball, which is a sphere. We are talking about the surface area of this sphere which has a formula of

$S=4\pi r^2$

In the problem we are given diameter, not radius. What we know about the relationship between a radius and a diameter is that

d = 2r so

$\frac{d}{2}=r$ Now we can have the equation in terms of diameter instead of radius. Rewriting:

$S=4\pi(\frac{d}{2})^2$ which simplifies to

$S=4\pi(\frac{d^2}{4})$ and a bit more to

$S=\pi d^2$ (the 4's cancel out by division). Now that is a simple equation for which we have to find the derivative with respect to time.

$\frac{dS}{dt}=\pi*2d\frac{dD}{dt}$ Now let's look at the problem and see what we are given as far as information.

The rate at which the surface area changes is -3.8, and we are looking for $\frac{dD}{dt}$ , the rate at which the diameter is changing, when the diameter is 13. Filling in:

$-3.8=\pi(2)(13)\frac{dD}{dt}$ and solving for the rate at which the diameter is changing:

$-\frac{3.8}{26\pi}=\frac{dD}{dt}$ and divide to get

$\frac{dD}{dt}=-.459\frac{cm}{min}$ Obviously, the negative means that the diameter is decreasing.

7 0

3 years ago

Compute 41, 42, 43, 44, 45, 46, 47, and 48. Make a conjecture about the units digit of 4n where n is a positive integer. Use str

padilas [110]

Answer:

The conjecture is that the unit digit of 4^n = 4 when n = odd also 4^n = 6 when n = even

Step-by-step explanation:

$4^1 = 4\\4^2 = 16\\4^3 = 64\\4^4 = 256 \\4^5 = 1024\\4^6 = 4096\\4^7 = 16384\\4^8 = 65536$

The conjecture is that the unit digit of 4^n = 4 when n = odd also 4^n = 6 when n = even

To prove this conjecture

$4^1 = 4\\4^2 = 16$ unit digit = 6

hence the property is true for ; n = 1 and n = 2 and also for every odd and even number ( i.e. from 1 to 8 )

8 0

3 years ago

Jack is in charge of road construction crew. The crew must complete 6/7 of a mile of the road by the end of the day. By noon the

Crazy boy [7]

3/7? I’m not positive on this, it’s very straightforward but i mean 6/7 - 3/7 = 3/7 so i’m going with that

5 0

3 years ago

The endpoints of AB are A(1,4) and B(5,-1). What are the coordinates of the point that divides AB in the ratio 2:3?

Arada [10]

the answer would be C

 https://answers.yahoo.com/question/index?qid=20150420093325AAnAudN
here is what i found that could help you

8 0

2 years ago