Answer:
The amount of sodium- 24 remain after 90 hours of decay is 8.90 gram
Step-by-step explanation:
Given as :
The amount of sodium-24 = 900 gram
The decay rate of sodium is 5 %
The time period for its decay = 90 hours
Or, 
Or, Final value of sodium -24 = 900 g × 
Or, Final value of sodium -24 = 900 g × 
∴ Final value of sodium -24 = 8.899 gram
Hence The amount of sodium- 24 remain after 90 hours of decay is 8.90 gram Answer
Answer:
5/37.
Step-by-step explanation:
Sum:
3/4 + -4/7
= 21/28 - 16/28
= 5/28
Difference:
3/4 - (-4/7)
= 3/4 + 4/7
= 21/28 + 16/28
= 37/28.
Dividing:
5/28 / 37/28
= 5/28 * 28/37
= 5/37.
Answer:
√6 + √15
Step-by-step explanation:
√3(√2 + √5)=√3√2+√3√5
= √6 + √15
Answer:
Step-by-step explanation:
In a parallelogram, this one in particular:
KR = RM
JR = RL
We are looking in the end for the length of JR, but that means that we need to solve for x somehow to plug in the expression for JL, and then split that in half. Here's how we're going to go about it. I know that
KM = KR + RM, but since KR and RM are the same length, the equation becomes
KM = 2KR. Filling that in with the expressions I'm given for KM and KR:
3x - 5 = 2(x + 7) and
3x - 5 = 2x + 14 and
x = 19. Now I can find the length of JL:
JL = 4x - 10 so
JL = 4(19) - 10 and
JL = 66
Knowing that JR = RL and JL is 66 units long, JR = RL = 33 units each.
Answer:
tons needed to unload a freight train= 21×2.5 =52.5
number of 3.5-ton payload trucks needed to unload a freight train=52.5÷3.5 = 15
15 Trucks , Each With A 3.5-Ton Payloaf , Would be Needed To Do The Same Job.
