In how many map squares did we
spot less than 20 plant species?

3

Step-by-step explanation:

You should get three because you don't look at 20 and above look at 19 and below and count how many there are and look at the number chart to see what the two bars are worth:

0 - 9 = 1

10 - 19 = 2

1 + 2 = 3

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval