Irounded 2639456 to the nearest ten-thousand and got 263 what did i do wrong?

2,640,000

Step-by-step explanation:

We have been given a number 2,639,456. We are asked to round our given number to nearest ten-thousand.

First of all, we will find place value of each digit as:

Ones: 6

Tens: 5

Hundreds: 4

Thousands: 9

Ten thousands: 3

Hundred thousands: 6

Millions: 2

We can see that ten thousands value is 3 and thousands value for our given number is 9.

Since thousands value for our given number is greater than 5, therefore, we will round up our answer to nearest ten thousands as:

Therefore, our required number would be 2,640,000.

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.