sat2数学问题,基础题10分
初中刚学,不是很明白,望解答,要一步步详细,谢谢!
1Evaluatetheexpressionusingthevaluesgiveninthetable(意思大概懂,但不会做.
x151012x-5-314
f(z)-310314g(z)1-8510
2C(x)=65x+4430R(x)=75xFindandinterpret(R-C)(731)
3giventhefunctionf(x)=5x^2-10x-4.whatisthedomainof?
4theradiusoftheoilslickonthesurfaceisr(t)6tftFindtheareaAoftheoilslickasfunctionoftime
a:A(r(t))=36πt^2
b:A(r(t))=36t^2
c:A(r(t))=36πt
d:A(r(t))=6πt^2
个别题目太长省略了,如果条件不完整,请告诉我,急!谢谢!