Answer:
8.2secs
Step-by-step explanation:
Given the expression for calculating the height as;
h = -16x^2+127x+80
Given h = 40
Substitute
40 = -16x^2+127x+80
-16x^2+127x+80 - 40 = 0
-16x^2+127x+40 = 0
16x^2-127x-40 = 0
Factorize
x = -(-127)±√(-127)²-4(16)(-40)/2(16)
x = 127±√16,129+2,560/32
x = 127±√18,689/32
x = 127±136.71/32
x = 127+136.71/32
x = 263.71/32
x = 8.24
Hence the required time to the nearest tenth is 8.2secs
Answer:
400%
Step-by-step explanation:
20 divided by 5 = 4
100 times 4 = 400
Answer:
Certain
Step-by-step explanation:
In a fraction 25/25 is a whole/1 and when you find probability it is from a scale of 0 to 1. 0 is impossible and 1 is certain. So if you have 25/25 probability something will happen it is certain to happen. Hope this helped you!
Answer:
3,10 please give me brainliest i need one more for 5 please please please
Step-by-step explanation:
No
Imagine multiples to be 'times tables'. So the multiples of 9 are the 9 times table:
9, 18, 27, 36 and so on.
3 would be a factor of 9. Factors are numbers that can divide exactly into another number.
I hope I helped!