Lesson 12: Practice Problems
Problem 1
Which is larger: the number of meters across the Milky Way, or the number of cells in all humans? Explain or show your reasoning.
Some useful information:
The Milky Way is about 100,000 light years across.
There are about 37 trillion cells in a human body.
One light year is about
meters. The world population is about 7 billion.
Problem 2 From Unit 6 Lesson 5
Ecologists measure the body length and wingspan of 127 butterfly specimens caught in a single field.
Draw a line that you think is a good fit for the data.
Write an equation for the line.
What does the slope of the line tell you about the wingspans and lengths of these butterflies?
Problem 3 From Unit 4 Lesson 5
Diego was solving an equation, but when he checked his answer, he saw his solution was incorrect. He knows he made a mistake, but he can’t find it. Where is Diego’s mistake and what is the solution to the equation?
Problem 4 From Unit 2 Lesson 7
The two triangles are similar. Find
