All categories

3 years ago

It took max 5 min to type 410 words. How many words per min does max type?

Mathematics

1 answer:

aalyn [17]3 years ago

3 0

Answer:

82 words per min

Step-by-step explanation:

all you have to do is divide 410 by 5 (410/5)

410/5 = 82

You might be interested in

A 29-meter ladder is sliding down a vertical wall so the distance between the top of the ladder and the ground is decreasing at

vitfil [10]

Complete question

A 29-meter ladder is sliding down a vertical wall so the distance between the top of the ladder and the ground is decreasing at 7 meters per minute. At a certain instant, the bottom of the ladder is 21 meters from the wall.

What is the rate of change of the distance between the bottom of the ladder and the wall at that instant(in meters per minute)

Answer:

$\frac{dx}{dt}=11.94m/min$

Step-by-step explanation:

From the question we are told that

Slant height $z=29m$

Change in Vertical height $\triangle y=7m/s$

Horizontal length $x=21$

Generally in finding the distance form the top to the bottom of the wall it is mathematically given by

$x^2+y^2=z^2$

$21^2+y^2=29^2$

$y^2=29^2+21^2$

$y=35.81$

Generally solving for the differential equation is mathematically represented as

$x^2+y^2=29^2$

$2x*\frac{dx}{dt} +2y*\frac{dy}{dt} =0$

$x*\frac{dx}{dt} +y*\frac{dy}{dt} =0$

$(21)*\frac{dx}{dt} +(35.81)*(-7) =0$

$(21)*\frac{dx}{dt} -250.64 =0$

$\frac{dx}{dt}=\frac{250.64}{21}$

$\frac{dx}{dt}=11.94m/min$

5 0

3 years ago

Plz help!!!!!!!!!!!!!!!!!!!

raketka [301]

Answer:

h(0) = 10

h(4) = 16

Step-by-step explanation:

h(0) = 2(0)² - 3(0) + 10 = 10

h(4) = 2^4 = 16

8 0

3 years ago

When utilizing ANOVA, what does the between group sum of squares measure?

zhenek [66]

Answer:

b. The sum of the squared deviations between each group mean and the mean across all groups

Step-by-step explanation:

Previous concepts

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"

Solution to the problem

If we assume that we have $p$ groups and on each group from $j=1,\dots,p$ we have $n_j$ individuals on each group we can define the following formulas of variation:

$SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2$

$SS_{between}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2$

$SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2$

And we have this property

$SST=SS_{between}+SS_{within}$

As we can see the sum of squares between represent the sum of squared deviations between each group mean and the mean across all groups.

$SS_{between}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2$

So then the best option is:

b. The sum of the squared deviations between each group mean and the mean across all groups

5 0

3 years ago

The product y = Ax of an m × n matrix A times a vector x = (x1, x2, . . . , xn) T can be computed row-wise as y = [A(1,:)*x; A(2

steposvetlana [31]

Answer: m × n matrix A times a vector x = (x1, x2, . . . , xn) T can be computed row-wise as ... .m file function y = myrowproduct(A,x) y=[]; [r1 c1]=size(A); [r2 c2]=size(x); if ... The product y Ax of an m x n matrix A times a vector x (ri,z2, ...,zn)T can be ... Repeat with a 3 x 4 matrix and a 4 x 1 vector and with a 3 x 4 matrix and a 1 x ...

Step-by-step explanation:

6 0

4 years ago

Nydia bought 1 pizza plus 2 toppings from Papa John's for $11. Ivan bought

PIT_PIT [208]

Answer:

1.25 Per topping

Step-by-step explanation:

First I looked at nydia and saw she bought 1 pizza just like Ivan but she bought 2 toppings Ivan bought 5 so i subtracted 11$ from 14.75$ and got 3.75$ and i divided that by 3 and got<u> 1.25$</u>

7 0

3 years ago