Answer:
1.6 tons
Step-by-step explanation:
First, find the weight in pounds:
80(40)
= 3,200
Convert this to tons by dividing it by 2000, since there are 2000 pounds in a ton:
3200/2000
= 1.6
So, the total weight was 1.6 tons
Answer:
For a scientific experiment, a physicist must make sure that the temperature of metal at 0° C gets no colder than -80° C. The physicist changes the metal’s temperature at a steady rate of -4° C per hour. For how long can the physicists change the temperature?
Step-by-step explanation:
A + b
= -10 + 4
= 4 - 10
= -6
Ab/ac = ae/ad = be/cd
4/ac = 6/15
6 ac = 60
ac = 60/6 = 10
ac = 10
you need 10 8' planks of wood because 15x3= 45+9x4= 77, then 77÷8= 9.625, but you can't get .625 of a plank, so 10. hope you get a good grade!
