caption: The number is increasing at 306 per hour.
exif: {"Image DocumentName": "The number is increasing at 306 per hour.", "Image ImageDescription": "e.g. The equation below gives the number, x, of bacteria in a solution t hours after counting started: (i) How many bacteria are there after 2 hours? (ii) How fast is the number increasing after 2 hours? Solution: (i) (ii) We are being asked to find a rate of increase. The number is increasing at 306 per hour.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}