Asked by Dfca

Why might scientists first want to build and study a model of their proposed project?
Answered by Ms. Sue
What does your book say?

Answered by Dfca
I don't have one this year or last year that is why its hard
Answered by Ms. Sue
I'm sorry, but Jiskha cannot supply you with a book.

Why are you taking a class without a book? How do you expect to learn?

Answered by Dfca
I am home schooled and need help with this. I got the other questions this is the only one i need. If i had a book i would use it.
Answered by Skkye
I am home schooled too! What school do you attend?
Answered by PsyDAG
Less expensive to indicate possible problems.
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