course hero square has 9 boxes, each of which can be either black or white

Should you buy a subscription for Course Hero?

Jan 20, 2014 · How do I solve this? 003 10.0 points A 3 x 3 square has 9 boxes, each of which can be either black or white. How many distinct arrangements …

How many unlocks do I get with Course Hero Premier subscription?

Unit 1 Lesson 7 Name(s)_____Ragul_____ Period ___1___ Date _____28_____ Activity Guide - Black and White Images Building a Digital Image Work to digitally represent the image below Read each square of the image and fill in the responses on the worksheet Enter the bits in Code Studio and use a timer to keep track of how long it takes Remember: Each bit can only be either black or …

How to unblur a document from Course Hero?

Sep 01, 2020 · Unit 1 Lesson 7 Name(s)_____ Period _____ Date _____ Activity Guide - Black and White Images Building a Digital Image Work to digitally represent the image below Read each square of the image and fill in the responses on the worksheet Enter the bits in Code Studio and use a timer to keep track of how long it takes Remember: Each bit can only be either black or …

How often can you unblur 30 Course Hero?

With these 30 unlocks you get every month, you can unblur 30 Course Hero documents. These unlocks refresh every month. And if you have any unused ones, they won’t carry over to the next month. It also saves you from having to spend time uploading any of your documents.

How many unlocks does Course Hero give?

When the Course Hero team approves your documents, you’d get free unlocks in an email. For every 10 successfully approved documents, you get 5 unlocks. You can use 1 unlock to unblur one Course Hero document. It’s good practice to upload extra documents, just in case, as only the ones that’ll get accepted will count towards the number ...

How long does it take for unlocks to expire?

All unlocks you receive after uploading documents expire after 30 days.

How to refresh iPhone battery?

Before you get the app, you’ll have to change some settings on your device. On your iPhone, go to the Settings app and tap the option for ‘Battery’. Then, make sure that ‘Low Power Mode’ is turned off. Now, go to the ‘General’ settings. Tap the option for ‘Background App Refresh’.

What is Course Hero?

And Course Hero is one of the most popular websites when it comes to homework help. With their repository of real assignment questions from real and tangible courses from top colleges and schools, the chances of you stumbling into the exact question you were looking for are pretty high.

How much is Course Hero?

You can get a Course Hero subscription for $39.95/month for a month, $19.95/month for a 3-month subscription (one up-front payment of $59.85), or $9.95/month for a yearly subscription (an up-front payment of $119.40). If you plan on using Course Hero often, a subscription might be the way you want to go. You can also pool some money ...

Can you make a quiz on Course Hero?

You can make a quiz and submit it for any document on Course Hero, but this requires you to have an unblurred document initially. So, this method can be thought of as a way of getting additional unlocks as it isn’t particularly useful in the beginning when you don’t have any unlocks to unblur a document.

Problem 20

A square is partitioned into unit squares. Each unit square is painted either white or black with each color being equally likely, chosen independently and at random. The square is then rotated clockwise about its center, and every white square in a position formerly occupied by a black square is painted black.

Solution 1

First, look for invariants. The center, unaffected by rotation, must be black. So automatically, the chance is less than Note that a rotation requires that black squares be across from each other across a vertical or horizontal axis.

Solution 2

First, there is only one way for the middle square to be black because it is not affected by the rotation. Then we can consider the corners and edges separately. Let's first just consider the number of ways we can color the corners. There is case with all black squares. There are four cases with one white square and all work.

Solution 3

We proceed by casework. Note that the middle square must be black because when rotated 90 degrees, it must keep its position. Now we have to deal with the following cases: Case 1: 0 white squares. There is exactly way to color the grid this way. Case 2: 1 white square.