Answer:
720 pounds
Step-by-step explanation:
According to the scenario, calculation of the given data are as follows,
Number of mangoes in a barrel = 400
Each mango weight = 1.8 pounds
So, we can calculate the total weight of mangoes by using following formula,
Total weight = Number of mangoes in a barrel × Each mango weight
By putting value, we get
Total weight = 400 × 1.8 pounds
= 720 pounds
X will be the speed of species b and 4x will be the speed of species a:
x + 4x = 180
5x = 180
x = 180 / 5
x = 36 m/h
If species b has a speed of 36 m/h, the speed of species a is 4 times that:
4 x 36 = 144 m/h.
Answer:

Hope it helped,
Happy homework/ study/ exam!
Answer: I think its 45 days
Step-by-step explanation: hope this helps
Answer:
There are 20 kids total in the class.
Step-by-step explanation:
15/100 × 20 = 3
You can use direct proportion for any percent calculation.
Compare each number with its percent.
3 i
s 15
% of what number? Let the number be x
So, 3 represents 15
% and x represents 100
%
x/
100
= 3/15
Multiply by 100 to isolate x
x = 
x = 20
Check: 15/
100 × 20 = 3