# Recent content by lalahelp

2. ### Find f`(x) for the tangent line of the graph

Homework Statement Suppose line tangent to graph of y=f(x) at x =3 passes through (-3, 7) & (2,-1). Find f'(3), what is the equation of the tangent line to f at 3? Homework Equations I found the slope of which equals -8/5 Im not sure how to find the equation... do I do...
3. ### Weight Chart finding average

okkk now I understand what you mean thank you!!!!!
4. ### Weight Chart finding average

Im not really understanding what your trying to explain. so the rate of weight is not used?
5. ### Factor volume changed

No, I dont understand your steps of what to do.
6. ### Weight Chart finding average

Ok thanks I got A and B. For part C Im not sure, Do I divide 1.53 (from part A) by 12?
7. ### Factor volume changed

Homework Statement Initially, A yoga ball is partially blown up and its surface area measured. Afterwards, it is filled completely and its surface area is found to be 1.50 times as big as it was recorded earlier. By what factor has its volume changed? Im not sure how to solve for...
8. ### Weight Chart finding average

So for part A I should subtract 7.4-6.6 9.6-7.4 11.2 -9.6 add the totals together and divide by three?
9. ### Weight Chart finding average

Homework Statement The weight of a baby measured over an 11-month period is given in the weight chart below for this problem. Weight (lb) Age (months) 6.6 0 (birth) 7.4 1.0 9.6 2.0 11.2 3.0 12.0 4.0 13.6 5.0...
10. ### Thermodynamics and heat engine

Homework Statement A certain engine can propel a 1600 kg car from rest to a speed of 22 m/s in 9.7 s with an efficiency of 23%. what is the rate of heat flow into the engine at the high temperature? what is the rate of heat flow out of the engine at the low temperature? 2. Homework...
11. ### PV diagrams monatomic ideal gas

Homework Statement Suppose a monatomic ideal gas is changed from state A to state D by one of the processes shown on the PV diagram. (Let V1 = 4.80 L and P1 = 3.30 atm.) (a) Find the total work done on the gas if it follows the constant pressure path A−E followed by the constant...
12. ### Rate of heat transfer passing from the boiling water to the ice bath

Can you do the next step please
13. ### Rate will this student burn calories

Yes your right but even with that I still get the wrong answer
14. ### Rate of heat transfer passing from the boiling water to the ice bath

How did you solve for ∅?
15. ### Rate will this student burn calories

rate will this student "burn" calories Homework Statement A student wants to lose some weight. He knows that rigorous aerobic activity uses about 700 kcal/h (2900 kJ/h) and that it takes about 2000 kcal per day (8400 kJ) just to support necessary biological functions, including keeping the...