There are some red counters and some white counters in a bag. At the start, 7 of the counters are red, the rest of the counters are white
Alfie takes at random a counter from the bag.
He does not put the counter back in the
bag. omditional
Alfie then takes at random another counter from the bag.
21
The probability that the first counter Alfie takes is white and the second counter Alfie takes is red is 80
Work out the number of white counters in the bag at the start

2,600 divided by 80 = 32.5

step-by-step explanation:

i do not know the answer

step-by-step explanation:

she was supposed to add the hours(38.5) and multiply the amount of money she earned(7.50) resulting in $288.75 .

correct me if i'm wrong and if it is i'm truly sorry.

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: