The equation 680(0.87)t=340 can be used to find the time, t, in years, it takes for 680 grams of a radioactive element to decay to 340 grams. To solve the equation 680(0.87)t=340, a student graphs the equations y=680(0.87)t and y=340.

what do you need me to answer?

step-by-step explanation:

the circumference of a circle is, 10.676 cm.

step-by-step explanation:

the formula for circumference of a circle is given by:

where

c is the circumference of a circle and

d is the diameter of a circle.

given: diameter(d) = 3.4 cm and use

substitute these values in [1] we get;

cm

therefore, the circumference of a circle is, 10.676 cm

this cant be answered without the graph. you may need to add it.

one triangle is 2.5 times bigger than the other triangle.