38. (a) how much work is done lifting a 60 pound chair from the ground to the top of a 20 foot

building with a cable which weighs 1 pound per foot?

(b) how much work is done lifting the same chair from the ground to a height of 5 feet with the same

cable?

39. (a) how much work is done lifting a 10 pound calculus book from the ground to the top of a 30 foot

building with a cable which weighs 2 pounds per foot?

(b) from the ground to a height of 10 feet? (c) from a height of 10 feet to a height of 20 feet?

40. how much work is done lifting an 80 pound injured child to the top of a 20 foot hole using a stretcher

weighing 14 pounds and a cable which weighs 1 pound per foot?

42. how much work is done lifting an 120 pound injured adult to the top of a 30 foot hole using a stretcher

weighing 10 pounds and a cable which weighs 2 pound per foot?

no

step-by-step explanation:

2-7=-5

7-2=5

when you combing like terms for ech expression, 5 and -5. these numbers are not equal to each other.

lol

step-by-step explanation:

step-by-step explanation:

jbjuiuhuhuuy

answer: ay  

fonsi  

dy  

oh

oh no, oh no

oh yeah

diridiri, dirididi daddy  

go

sí, sabes que ya llevo un rato mirándote  

tengo que bailar contigo hoy (dy)  

vi que tu mirada ya estaba llamándome  

muéstrame el camino que yo voy (oh)

tú, tú eres el imán y yo soy el metal  

me voy acercando y voy armando el plan  

solo con pensarlo se acelera el pulso (oh yeah)

ya, ya me está gustando más de lo normal  

todos mis sentidos van pidiendo más  

esto hay que tomarlo sin ningún apuro

despacito  

quiero respirar tu cuello despacito  

deja que te diga cosas al oído  

para que te acuerdes si no estás conmigo

despacito  

quiero desnudarte a besos despacito  

firmo en las paredes de tu laberinto  

y hacer de tu cuerpo todo un manuscrito (sube, sube, sube)

(sube, sube)